National safety competition of 1940

Author: Adams, William W.
Additional Authors: Lawrence, T. D.
Year: 1941
Document Type: BMRA
Issuing Agency: U.S. Dept. of the Interior, Bureau of Mines,
SUDOC: I 28.23:3581
Series: Report of investigations / United States Department of the Interior, Bureau of Mines ;
Report Number: 3581
Subject: Mine safety
Link: https://hdl.handle.net/2027/mdp.39015078495218

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