Escapeways and other emergency measures in coal mines

Author: Stahl, R. Ward.
Year: 1962
Document Type: USBI
Issuing Agency: U.S. Dept. of the Interior, Bureau of Mines,
SUDOC: I 28.27:8127
Series: Information circular / Bureau of Mines ;
Report Number: 8127
Subject: Coal mines and mining--Safety measures
Link: https://hdl.handle.net/2027/mdp.39015077564303

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