Inspections and investigations in coal mines. Hearings before a subcommittee on the Committee on Mines and Mining, United States Senate, Seventy-sixth Congress, first session, on S. 2420, a bill relating to certain inspections and investigations in coal mines for the purpose of obtaining information relating to health and safety conditions, accidents, and occupational diseases therein, and for other purposes. June 1, 13, and 20, 1939 ..

Author / Creator

United States. Congress. Senate. Committee on Mines and Mining

Available as

Physical