Tentative coal-mine inspection standards

Year:	1942
Document Type:	USBI
Issuing Agency:	U.S. Dept. of the Interior, Bureau of Mines,
SUDOC:	I 28.27:7204
Series:	Information circular ;
Report Number:	7204
Subjects:	Coal mines and mining--Safety regulations--United States
	Mine inspection--Standards--United States
Link:	https://hdl.handle.net/2027/mdp.39015074126734