Recommendations of the United States Bureau of Mines on certain questions of safety as of February 3, 1933

Year: 1933
Document Type: USBI
Issuing Agency: U.S. Dept. of Commerce, Bureau of Mines,
SUDOC: C 22.11:6732
Series: Information circular / Bureau of Mines ;
Report Number: 6732
Subject: Mine safety
Link: https://hdl.handle.net/2027/mdp.39015086486019

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