Permissible mine equipment approved during 1943

Author: Gleim, E. J.
Year: 1944
Document Type: USBI
Issuing Agency: U.S. Dept. of the Interior, Bureau of Mines,
SUDOC: I 28.27:7283
Series: Information circular / United States Department of the Interior, Bureau of Mines ;
Report Number: 7283
Subjects: Coal mines and mining--United States--Safety measures
Mines safety--United States--Equipment and supplies
Link: https://hdl.handle.net/2027/mdp.39015077571001

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