Health hazards from inadequate coal-mine ventilation

Author:	Sayers, R. R.
Year:	1942
Document Type:	USBI
Issuing Agency:	U.S. Dept. of the Interior, Bureau of Mines,
SUDOC:	I 28.27:7221
Series:	Information circular / United States Department of the Interior, Bureau of Mines ;
Report Number:	7221
Subjects:	Ventilation systems--Coal mines and mining
	Mine safety
	Mine ventilation
Link:	https://hdl.handle.net/2027/mdp.39015077570821