Tentative inspection standards for anthracite mines

Year:	1943
Document Type:	USBI
Issuing Agency:	U.S. Dept. of the Interior, Bureau of Mines,
SUDOC:	I 28.27:7231
Series:	Information circular / United States Department of the Interior, Bureau of Mines ;
Report Number:	7231
Subjects:	Coal mines and mining--Safety regulations--United States
	Mine inspection--Standards--United States
	Anthracite coal industry--Standards--United States
Link:	https://hdl.handle.net/2027/mdp.39015077570805