Safety committees in the coal mines of the state of Washington

Author: Ash, S. H.
Year: 1930
Document Type: MAIN
Issuing Agency: U.S. Dept. of Commerce, Bureau of Mines,
SUDOC: C 22.11:6283
Series: Information circular ;
Report Number: 6283
Subject: Coal mines and mining--Washington (State)--Safety measures
Link: https://hdl.handle.net/2027/mdp.39015095083716

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