1 result for “General Electric”
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Magazine · Industrial Hygiene Digest · 1939
Industrial Hygiene Digest, 1939
…of Mines, Information Circular No. 7081, June 1939) Aug. 1939 August 1939 (Vol. 3, No. 8) Investigation of electrical equipment, safety lamps and gas detectors for safety (L. C. Ilsley, U.S. Bur. of Mines, Information…