Woodsreef mine, near Barraba, New South Wales

The Woodsreef mine, near Barraba in New South Wales, Australia, was an open-pit chrysotile mine and mill.^6,9 A 1955 article in Asbestos, the industry's trade journal, says that "the Woods Reef deposit was worked from 1918 to 1923 for a total output of 2,478 tons, but operations were suspended when production costs were found to be too high."¹ The same article says that Australia's first asbestos mill, built at Anderson's Creek in 1917, "was moved to Woods Reef, N.S.W., after the mine closed in 1919."¹

Exploration and building

Asbestos reported in 1966 that Merit Oil was "drilling on its asbestos deposit at Barraba," and in 1967 that Castle Tin Mines and Merit Oil would jointly explore the White Asbestos Mining Company's property near Barraba.^10,11 In June 1968 the journal said Merit Oil and Castle Tin Mines had assay results from four drill holes on "their Woodsreef asbestos property"; in December 1968 it reported the same four holes as the work of Pacific Asbestos Limited, of Toronto, on "its Woodsreef asbestos property."^2,12 In 1969 it reported that "a two-year exploration and bulk sampling program was completed" and that "Pacific intends to put the property into production by May 1971."⁸

The U.S. Bureau of Mines' Minerals Yearbook for 1969, drawing on Industrial Minerals, said Pacific Asbestos planned to produce "65,000 tons of short-fiber chrysotile annually" and that "mining was to be by open pit methods."⁵ In 1970 Asbestos reported Pacific Asbestos "constructing an $18 million plant" with "the capacity to annually produce 70,000 tons of Chrysotile fiber in Grades 4 through 7."⁶ The yearbook for 1970, citing the Northern Miner of Toronto, said "plant construction, mine preparation, and personnel recruitment are all well underway," and gave "27 million tons of proven ore reserves with a potential of 90 million tons."⁷

The sales contract is described two ways: Asbestos reported in 1970 that the Japanese trading company Marubeni Iida agreed to buy "over a period of 5½ years, 210,000 short tons of fiber," while the yearbook for 1971 reported "a 5-year, 200,000-ton contract with a Japanese firm."^3,6

Opening

The sources give different starting dates: the yearbook for 1971 said Chrysotile Corp. of Australia, a Woodsreef Mines subsidiary, "prepared for its December 17 commissioning date," though that page names only the company.³ The yearbook for 1972 said "the Woodsreef mine and mill began operation in January 1972," with "an official dedication in April."⁴ Asbestos dates the start to February 1972, "when the mill was commissioned."^13,14

Owners and receivership

The sources differ on which company had been Pacific Asbestos: the yearbook for 1972 says the "parent Canadian company (formerly Pacific Asbestos) is now officially Woodsreef Minerals, Ltd.," while Asbestos in 1972 wrote of "Woodsreef Mines Ltd. (formerly Pacific Asbestos Ltd.)," whose subsidiary Chrysotile Corporation of Australia ran the property.^4,13 The yearbook for 1973 said "the Woodsreef mine ran into trouble on two fronts": a revalued Australian dollar cut revenue "at a time when equipment inadequacies would not permit increased production."¹⁵ Asbestos reported the operation "under receiver-managership since November 1973."¹⁴

In 1978 the yearbook says the Cabinet "extended a A$1.4 million grant," while Asbestos says that on October 24, 1978, the Australian Commonwealth Government decided "to offer a loan of up to A$1.4-million."^16,17 In January 1981 the journal reported "an interest-bearing repayable grant of up to $1-million" and named the Toronto parent as "Transpacific Asbestos Inc. (formerly Woodsreef Minerals Ltd.)."¹⁸ The yearbook for 1981 says Woodsreef Mines received enough from "its parent company, Trans Pacific Asbestos, Ltd., of Canada, to retire its bank loan and come out of receivership."¹⁹

The pits and the output

Asbestos reported that in May 1975 operations moved "from the south pit to the north pit."^20,21 Its reserve figures differ from issue to issue: 10.04-million metric tons proven at the north pit (August 1975); 8-million short tons proven north of the mine (December 1975); and, from the company's report, 21.2-million tons at the North Pit and 7.03-million tons in the South Pit at the end of November 1975.^14,20,22 The company later gave "24,238,000 tonnes, sufficient to maintain a mine life until mid-1988."²³ In 1976 the yearbook reported "a promising new ore body near Baryulgil," and Asbestos said the Barraba mill had "six production lines."^22,24

Asbestos printed the output: 5,242 tons from February to June 1972, 179,256 metric tons from February 1972 to June 1976 (figures supplied by Chrysotile Corporation of Australia), and 65,911.5 metric tons for the year to June 1977.^13,21,25 The yearbook said production for that year "more than doubled the record high set in 1972."²⁶ For 1980 the journal gave two figures, 83,427 metric tonnes in January 1981 and 83,466 metric tonnes in April 1981.^18,27 The company reported "problems experienced with major mining equipment at Barraba through 1977" and named its "natural market area of South-East Asia, Japan and India."^28,29

Dust control and the workers

In January 1981 Asbestos reported that "installation of additional dust control equipment was completed."¹⁸ Hours were cut more than once: from a 7-day to a 6-day week at Barraba, as the company reported for the quarter ended January 31, 1978, and "from a 6-day to a 5-day week operation" from January 1, 1981.^27,28 The yearbook for 1981 said "the recession forced reduction in work from a normal 3 shifts per day 5 days per week to 1 shift per day 5 days per week."¹⁹

The wet mill and the end

In 1979 Asbestos reported a "wet process prototype mill," to be built "close to the existing mill at Barraba" and "scheduled to begin operating in February 1980."²⁹ The yearbook for 1981 still described the prototype as "intended."¹⁹ The yearbook for 1982 reported a "1.5-ton-per-day prototype asbestos wet mill in operation in Australia in January," without naming the place, and the yearbook for 1990, drawing on Australian Mining, says "Woodsreef Mine and ICI Australia constructed a prototype wet milling facility in 1982."^9,30

That 1990 yearbook says the site, "consisting of an open pit mine and dry processing facility, closed in 1983."⁹ In 1984 Woodsreef "announced plans to reopen its mine at Barraba early in 1985 if financing can be arranged," by processing "the 25 million tons of dry process tailings left from previous mining."³¹ The yearbook for 1985, citing Industrial Minerals, reported both that Woodsreef "had received approval from the Australian Government" and that the New South Wales State government rejected its application, the state's Minerals Resources Department being "not satisfied with the safety provisions of the mining project."³² In 1990, the yearbook says, "Woodsreef Mines continued to await governmental approval to rehabilitate its mine site."⁹

The documents report this mine producing asbestos fiber for sale.²⁹

Preview. Parts of this page have not yet been checked against the documents by a person; they are marked unreviewed. The public site shows checked material only.

Location

Output the documents report

Figures as printed, in the units each document uses (short tons before about 1990, metric tons after, in most U.S. chapters). Some are a year's output, some a daily rate or a capacity, some a company's total rather than this mine's alone; the statement for that year below says which.

Year	Figure	Source
1969	65,000 tons of short-fiber chrysotile annually	5
1970	100,000 tons per year	7
1970	70,000 tons per year	7
1972	5,242 tons of fiber	13
1972	179,256 metric tons	21
1974	50,000 tons per year	33
1974	33,602 metric tons	14
1974	49,472 metric tons	22
1975	60,000 tons	34
1976	75,000 metric tons	21
1976	65,911.5 metric tons	25
1977	68,009 tonnes	17
1977	13,726 metric tons	28
1977	49,914 tonnes	17
1978	16,566 metric tonnes	35
1978	67,893 metric tonnes	29
1978	83,770 tonnes of fiber	23
1980	83,427 metric tonnes	18
1980	83,466 metric tonnes of asbestos fiber	27

Year by year

Every statement about this mine in the documents, in each document's own words, by the year it is about.

1918

• Worked: “The Woods Reef deposit was worked from 1918 to 1923 for a total output of 2,478 tons”, p. 10¹

1919

• Mill: “the mill was moved to Woods Reef, N.S.W., after the mine [at Anderson's Creek] closed in 1919”, p. 12¹

1923

• Closed: “operations were suspended when production costs were found to be too high”, p. 10¹

1966

• Exploration: “is drilling on its asbestos deposit at Barraba” (Merit Oil), p. 7¹⁰

1967

• Exploration: “will be jointly explored by Castle Tin Mines and Merit Oil Limited” (White Asbestos Mining Company; Castle Tin Mines; Merit Oil Limited), p. 7¹¹

1968

• Exploration: “the overall 90-million ton potential was reasonable” (Merit Oil Ltd.; Castle Tin Mines Limited), p. 29¹²
• Ownership: “its Woodsreef asbestos property” (Pacific Asbestos Limited), p. 12²

1969

• Fiber: “The fiber from the drill cores compares favorably with Canadian Groups 4 through 7” (Pacific Asbestos Limited), p. 22⁸
• Exploration: “A two-year exploration and bulk sampling program was completed about mid-year” (Pacific Asbestos Limited), p. 22⁸
• Exploration: “plans a mining and milling operation at the company's property near Barraba, New South Wales” (Pacific Asbestos Ltd.), as reported by Industrial Minerals, p. 6⁵
• Description: “Mining was to be by open pit methods” (Pacific Asbestos Ltd.), as reported by Industrial Minerals, p. 6⁵
• Output: “to produce 65,000 tons of short-fiber chrysotile annually” (Pacific Asbestos Ltd.), as reported by Industrial Minerals, p. 6⁵

1970

• Buyers: “has agreed to purchase, over a period of 5 1/2 years, 210,000 short tons of fiber” (Pacific Asbestos Ltd.; Marubeni Iida), p. 16⁶
• Mill: “is constructing an $18 million plant ... it will have the capacity to annually produce 70,000 tons of Chrysotile fiber” (Pacific Asbestos Ltd.), p. 16⁶
• Opened: “Plant construction, mine preparation, and personnel recruitment are all well underway at the new Pacific Asbestos site at Barraba” (Pacific Asbestos), as reported by Northern Miner (Toronto), p. 8⁷
• Output: “An anticipated 100,000 tons per year should come by the end of 2 years' operation” (Pacific Asbestos), as reported by Northern Miner (Toronto), p. 8⁷
• Output: “Full operation at a rate of 70,000 tons per year of chrysotile fibers should be accomplished this year” (Pacific Asbestos), as reported by Northern Miner (Toronto), p. 8⁷
• Reserves: “27 million tons of proven ore reserves with a potential of 90 million tons” (Pacific Asbestos), as reported by Northern Miner (Toronto), p. 8⁷

1971

• Buyers: “A 5-year, 200,000-ton contract with a Japanese firm was obtained” (Chrysotile Corp. of Australia Pty. Ltd.), p. 8³
• Ownership: “Chrysotile Corp. of Australia Pty. Ltd., Woodsreef Mines Ltd. subsidiary” (Chrysotile Corp. of Australia Pty. Ltd.), p. 8³
• Opened: “prepared for its December 17 commissioning date” (Chrysotile Corp. of Australia Pty. Ltd.), p. 8³

1972

• Mill: “This capacity (70,000 tons per year fiber) is felt to be inadequate, and plans for doubling it by 1975 are underway” (Woodsreef Minerals, Ltd.), p. 9⁴
• Mill: “There was an official dedication in April and the mill was approaching full capacity throughout by yearend” (Woodsreef Minerals, Ltd.), p. 9⁴
• Ownership: “its parent Canadian company (formerly Pacific Asbestos) is now officially Woodsreef Minerals, Ltd.” (Woodsreef Minerals, Ltd.), p. 9⁴
• Opened: “The Woodsreef mine and mill began operation in January 1972”, p. 9⁴
• Output: “Total fiber production from February 1972 ... to June 1972 was 5,242 tons” (Chrysotile Corporation of Australia Pty. Ltd.), p. 16¹³
• Opened: “the opening of the mining and milling complex at Barraba, N.S.W., by Woodsreef Mines Ltd. (formerly Pacific Asbestos Ltd.)” (Woodsreef Mines Ltd.; Chrysotile Corporation of Australia Pty. Ltd.), p. 16¹³
• Opened: “opened its Chrysotile mining-milling complex at Barraba, N.S.W., in February 1972” (Woodsreef Mines Ltd.), p. 45¹⁴
• Output: “179,256 metric tons produced since the mine began operating in February 1972; year to 6/76, 61,151” (Chrysotile Corporation of Australia (Pty.) Ltd.), said by Chrysotile Corporation of Australia (Pty.) Ltd., as reported by Asbestos (magazine), p. 40²¹

1973

• Description: “The Woodsreef mine ran into trouble on two fronts”, p. 7¹⁵
• Output: “equipment inadequacies would not permit increased production”, p. 8¹⁵
• Description: “maybe not enough to reach the break-even point by the end of the year”, p. 8¹⁵

1974

• Ownership: “Chrysotile Corp., the parent company, was in receivership” (Chrysotile Corp.), p. 9³³
• Output: “producing at a rate of about 50,000 tons per year” (Chrysotile Corp.), p. 9³³
• Output: “asbestos fiber production for the 9 months to July 31, 1975, of 33,602 metric tons” (Woodsreef Mines Ltd.), p. 45¹⁴
• Output: “Fiber production totaled 49,472 metric tons for the latest year, 14,439 tons more than in 1974” (Chrysotile Corporation of Australia Pty. Ltd.), said by Woodsreef Mines Ltd., as reported by Asbestos (magazine), p. 28²²

1975

• Reserves: “proven ore reserves of 8-million short tons; probable ore reserves of 6.7-million tons” (Woodsreef Mines Ltd.), p. 45¹⁴
• Description: “based on the new ore reserves at the North Pit and on remaining economic reserves at the South Pit, the facility can be a viable operation” (Woodsreef Mines Ltd.), p. 45¹⁴
• Output: “the annual production of asbestos fibers would near 60,000 tons”, p. 9³⁴
• Description: “The Woodsreef mine seems to be turning the corner toward solvency”, p. 9³⁴
• Reserves: “the transfer of operations from the south pit to the north pit, at which proven reserves are now calculated at 10.04-million metric tons” (Woodsreef Mines Ltd.), p. 42²⁰
• Mill: “The mill began operating exclusively on ore from the North Pit in May 1975” (Woodsreef Mines Ltd.), p. 42²¹
• Reserves: “Proven ore reserves at the North Pit at the end of November 1975 were determined to be 21.2-million tons; South Pit ... 7.03-million tons of proven ore” (Chrysotile Corporation of Australia Pty. Ltd.), said by Woodsreef Mines Ltd., as reported by Asbestos (magazine), p. 28²²

1976

• Mill: “At present the Barraba Mill has six production lines, but space has been provided in the structure for two additional lines” (Chrysotile Corporation of Australia Pty. Ltd.), said by Woodsreef Mines Ltd., as reported by Asbestos (magazine), p. 28²²
• Output: “annual production may exceed 75,000 metric tons by the end of this year” (Woodsreef Mines Ltd.), p. 40²¹
• Exploration: “discovered a promising new ore body near Baryulgil in northern New South Wales”, p. 8²⁴
• Mill: “borrowed $A1.5 million to increase its annual capacity to 105,000 tons”, p. 8²⁴
• Reserves: “Estimates of reserves at both contiguous ore bodies have been revised upward”, p. 8²⁴
• Output: “Total output from February 1972 through June 1977 amounted to 245,167.5 metric tons; Year to June 1977—65,911.5 metric tons” (Chrysotile Corporation of Australia Pty. Ltd.), p. 38²⁵

1977

• Exploration: “In the course of drilling at Barraba, a second unrelated zone carrying economic fiber was intersected” (Woodsreef Mines Ltd.), p. 38²⁵
• Reserves: “New on-site reserves of fibers have been found” (Woodsreef Mines Ltd.), p. 8²⁶
• Exploration: “the Baryugil property remains promising” (Woodsreef Mines Ltd.), p. 8²⁶
• Ownership: “the receivership has not been vacated” (Woodsreef Mines Ltd.), p. 8²⁶
• Description: “The problems experienced with major mining equipment at Barraba through 1977 ... reduced the ability of the Barraba Mill to produce fiber at capacity” (Woodsreef Mines Ltd.), said by Woodsreef Mines Ltd., as reported by Asbestos (magazine), p. 26²⁸
• Output: “production for the year ended June 1977 more than doubled the record high set in 1972” (Woodsreef Mines Ltd.), p. 8²⁶
• Output: “Total output since the start of operations in February 1972 through June 1978 reached 313,176 tonnes; 68,009 tonnes to June 1978” (Chrysotile Corporation of Australia Pty. Ltd.), p. 50¹⁷
• Output: “production at its asbestos mines at Barraba and Baryulgil, Australia, totaled 13,726 metric tons; a change from a 7-day week to 6 days at the Barraba Mine” (Woodsreef Mines Ltd.), said by Woodsreef Mines Ltd., as reported by Asbestos (magazine), p. 26²⁸
• Output: “fiber production at the asbestos mines at Barraba and Baryulgil totaled 49,914 tonnes” (Woodsreef Mines Ltd.), p. 50¹⁷

1978

• Description: “gained a respite from its financial problems when ... the Cabinet extended a A$1.4 million grant” (Woodsreef Mines, Ltd.), p. 11¹⁶
• Ownership: “Woodsreef Mines and its parent company, Woodsreef Minerals Corp. of Canada” (Woodsreef Minerals Corp. of Canada), p. 11¹⁶
• Ownership: “the Australian Commonwealth Government announced its decision to offer a loan of up to A$1.4-million to assist in maintaining the operations; under receivership/managership since November 1973” (Australian Commonwealth Government), p. 50¹⁷
• Output: “production at its asbestos mines at Barraba and Baryulgil ... for the quarter ending January 31, 1979, totaled 16,566 metric tonnes” (Woodsreef Mines Ltd.), said by Woodsreef Mines Ltd., as reported by Asbestos (magazine), p. 36³⁵
• Output: “Output for the eleven months to September 30, 1979 amounted to 67,893 metric tonnes, 6% above the 63,973 tonnes produced for the same period in 1978” (Chrysotile Corporation of Australia Pty. Ltd.), p. 44²⁹
• Output: “Operating statistics in the latest 14-month period ... 14,330,912 tonnes of ore mined ... and 83,770 tonnes of fiber produced” (Chrysotile Corporation of Australia Pty. Ltd.), said by Woodsreef Mines Ltd., as reported by Asbestos (magazine), p. 44²³

1979

• Buyers: “because of the strong demand for fiber in Woodsreef's natural market area of South-East Asia, Japan and India” (Woodsreef Mines Ltd.), p. 44²⁹
• Reserves: “Proven ore reserves, reviewed as of December 1, 1979, total 24,238,000 tonnes, sufficient to maintain a mine life until mid-1988” (Chrysotile Corporation of Australia Pty. Ltd.), said by Woodsreef Mines Ltd., as reported by Asbestos (magazine), p. 44²³

1980

• Dust and health: “Installation of additional dust control equipment was completed and all items are now fully effective and operational” (Woodsreef Mines Ltd.), p. 34¹⁸
• Output: “totaled 83,427 metric tonnes in 1980; Output for the entire life of the mining/milling complex, February 1972 to December 1980, amounts to 507,770.5 tonnes” (Chrysotile Corporation of Australia Pty. Ltd.), p. 34¹⁸
• Output: “For the year to December 31, 1980, the Barraba Mine of Woodsreef Mines Ltd. ... produced 83,466 metric tonnes of asbestos fiber” (Woodsreef Mines Ltd.), p. 23²⁷
• Mill: “The new tailings recovery circuit at the Barraba Mine is now fully commissioned; construction of the wet process prototype mill ... scheduled to begin operating in February 1980, with the capacity to produce 1½ tonnes of wet fiber daily” (Woodsreef Mines Ltd.), p. 44²⁹
• Mill: “A prototype mill has been proposed for February 1980 startup” (Woodsreef Mines, Ltd.), p. 11¹⁶
• Ownership: “The parent company in Toronto, Ontario, Transpacific Asbestos Inc. (formerly Woodsreef Minerals Ltd.); The federal government of Australia announced it would support the Barraba Mine with an interest-bearing repayable grant of up to $1-million” (Transpacific Asbestos Inc.), p. 34¹⁸

1981

• Idle: “Effective January 1, 1981, the Barraba facility was reduced from a 6-day to a 5-day week operation” (Woodsreef Mines Ltd.), p. 23²⁷
• Mill: “intended to bring into operation a prototype mill to demonstrate its revolutionary wet milling process” (Trans Pacific Asbestos, Ltd.), p. 9¹⁹
• Ownership: “received enough funds from its parent company, Trans Pacific Asbestos, Ltd., of Canada, to retire its bank loan and come out of receivership” (Trans Pacific Asbestos, Ltd.), p. 8¹⁹
• Ownership: “Trans Pacific Asbestos, Ltd., parent company of Australia's Woodsreef Mine” (Trans Pacific Asbestos, Ltd.), p. 9¹⁹
• Workforce: “reduction in work from a normal 3 shifts per day 5 days per week to 1 shift per day 5 days per week” (Woodsreef Mines, Ltd.), p. 8¹⁹

1982

• Mill: “put their 1.5-ton-per-day prototype asbestos wet mill in operation in Australia in January” (Transpacific), as reported by The Northern Miner, p. 9³⁰
• Mill: “constructed a prototype wet milling facility in 1982” (Woodsreef Mines), as reported by Australian Mining, p. 5⁹
• Mill: “a recovery of 90% compared to 67% recovery with dry processing” (Woodsreef Mines), as reported by Australian Mining, p. 5⁹

1983

• Closed: “closed in 1983” (Woodsreef Mines), as reported by Australian Mining, p. 4⁹

1984

• Mill: “proposes to process the 25 million tons of dry process tailings left from previous mining for an expected 12-year operational life” (Woodsreef Mines Ltd.), p. 6³¹
• Reserves: “An additional 12 million tons of unmined ore is amenable to the wet process” (Woodsreef Mines Ltd.), p. 6³¹
• Description: “The main product line will be a grade 5R equivalent” (Woodsreef Mines Ltd.), p. 6³¹

1985

• Opened: “announced plans to reopen its mine at Barraba early in 1985 if financing can be arranged” (Woodsreef Mines Ltd.), p. 6³¹
• Description: “had received approval from the Australian Government to extract asbestos from mine tailings using a wet process” (Woodsreef Mines Ltd.), as reported by Industrial Minerals (London), p. 6³²
• Dust and health: “The NSW Minerals Resources Department was not satisfied with the safety provisions of the mining project” (Woodsreef Mines Ltd.), as reported by Industrial Minerals (London), p. 6³²
• Description: “rejected the Woodsreef Mines Ltd. application to extract 25 million tons of asbestos from mine tailings at its plant near Barraba” (Woodsreef Mines Ltd.), as reported by Industrial Minerals (London), p. 6³²

1990

• Idle: “continued to await governmental approval to rehabilitate its mine site” (Woodsreef Mines), as reported by Australian Mining, p. 4⁹

In medical studies

Medical studies in our research library that name this mine, by how they concern it. A search found every one that names the mine and an AI reader sorted them; the quotation, checked word for word against the text, shows where. Those that name the mine only in passing or in a reference list are left out.

Studies of the mine’s fiber (2)

• McCrone WC 1974: Detection and identification of asbestos by microscopical dispersion staining
• McCutcheon J 2016: Microbially Accelerated Carbonate Mineral Precipitation as a Strategy for in Situ Carbon Sequestration and Rehabilitation of Asbestos Mine Sites

Other names

Documents call this mine “company's property near Barraba”, “Pacific Asbestos site at Barraba”, “Woodsreef mine”, “Woodsreef Mine”, “Woodsreef Mines Ltd. mine at Barraba”, “Woodsreef Mines”, “Woods Reef”, “Woodsreef asbestos property”, “asbestos property near Barraba”, “Wood's Reef Asbestos Mine”, “Barraba Mine”.

See also

• Woodsreef Mine in the Lexicon
• Pacific Asbestos Limited, Canada: the company's documents, people, products and plants
• All asbestos mines

References

1. Asbestos Magazine, 1955, July 1955 (July 1, 1955), pp. 10, 12.
2. Asbestos Magazine, 1968, December 1968 (December 1, 1968), p. 12.
3. Minerals Yearbook: Asbestos Chapters, 1971 (January 1, 1972), p. 8.
4. Minerals Yearbook: Asbestos Chapters, 1972 (January 1, 1973), p. 9.
5. Minerals Yearbook: Asbestos Chapters, 1969 (January 1, 1970), p. 6.
6. Asbestos Magazine, 1970, December 1970 (December 1, 1970), p. 16.
7. Minerals Yearbook: Asbestos Chapters, 1970 (January 1, 1971), p. 8.
8. Asbestos Magazine, 1969, December 1969 (December 1, 1969), p. 22.
9. Minerals Yearbook: Asbestos Chapters, 1990 (January 1, 1991), pp. 4–5.
10. Asbestos Magazine, 1966, December 1966 (December 1, 1966), p. 7.
11. Asbestos Magazine, 1967, December 1967 (December 1, 1967), p. 7.
12. Asbestos Magazine, 1968, June 1968 (June 1, 1968), p. 29.
13. Asbestos Magazine, 1972, December 1972 (December 1, 1972), p. 16.
14. Asbestos Magazine, 1975, December 1975 (December 1, 1975), p. 45.
15. Minerals Yearbook: Asbestos Chapters, 1973 (January 1, 1974), pp. 7–8.
16. Minerals Yearbook: Asbestos Chapters, 1978–79 (January 1, 1980), p. 11.
17. Asbestos Magazine, 1978, December 1978 (December 1, 1978), p. 50.
18. Asbestos Magazine, 1981, January 1981 (January 1, 1981), p. 34.
19. Minerals Yearbook: Asbestos Chapters, 1981 (January 1, 1982), pp. 8–9.
20. Asbestos Magazine, 1975, August 1975 (August 1, 1975), p. 42.
21. Asbestos Magazine, 1976, December 1976 (December 1, 1976), pp. 40, 42.
22. Asbestos Magazine, 1976, March 1976 (March 1, 1976), p. 28.
23. Asbestos Magazine, 1980, September 1980 (September 1, 1980), p. 44.
24. Minerals Yearbook: Asbestos Chapters, 1976 (January 1, 1977), p. 8.
25. Asbestos Magazine, 1977, December 1977 (December 1, 1977), p. 38.
26. Minerals Yearbook: Asbestos Chapters, 1977 (January 1, 1978), p. 8.
27. Asbestos Magazine, 1981, April 1981 (April 1, 1981), p. 23.
28. Asbestos Magazine, 1978, April 1978 (April 1, 1978), p. 26.
29. Asbestos Magazine, 1979, December 1979 (December 1, 1979), p. 44.
30. Minerals Yearbook: Asbestos Chapters, 1982 (January 1, 1983), p. 9.
31. Minerals Yearbook: Asbestos Chapters, 1984 (January 1, 1985), p. 6.
32. Minerals Yearbook: Asbestos Chapters, 1985 (January 1, 1986), p. 6.
33. Minerals Yearbook: Asbestos Chapters, 1974 (January 1, 1975), p. 9.
34. Minerals Yearbook: Asbestos Chapters, 1975 (January 1, 1976), p. 9.
35. Asbestos Magazine, 1979, April 1979 (April 1, 1979), p. 36.