Mine Safety Board decision 31:main fan installations at metal mines

Year: 1939
Document Type: USBI
Issuing Agency: U.S. Dept. of the Interior, Bureau of Mines,
SUDOC: I 28.27:7078
Series: Information circular / United States Department of the Interior, Bureau of Mines ;
Report Number: 7078
Subjects: Mine ventilation
Metal mines and mining--Safety measures
Link: https://hdl.handle.net/2027/mdp.39015077570466

< New search