Explanation and justification of tentative inspection standards for bituminous-coal mines and lignite mines.

Year:	1944
Document Type:	MAIN
Issuing Agency:	U.S. Govt. Print. Off.,
Series:	Miners' circular ;
Report Number:	45
Subjects:	Coal mines and mining--Safety measures
	Mining law--United States
	Mine inspection--Handbooks, manuals, etc
Link:	https://hdl.handle.net/2027/mdp.39015077562331