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Precautions to be taken when approaching old mine workings
Hazards of entering old mine workings
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Published Year
1940-1949 (2) *
Subject
Abandoned mines--United States (2) *
Mine safety--United States (2)
Mineral industries--Safety measures (1)
Mines and mineral resources--United States--Safety measures (1)
Author
Harrington, D. (1)
Look, Allen D. (1)
Van Fleet, Leonard A. (1)
Walker, Stanley M. (1)
Warncke, R. G. (1)
