List of permissible self-contained oxygen breathing apparatus, gas masks, and hose masks

Year:	1930
Document Type:	MAIN
Issuing Agency:	U.S. Dept. of Commerce, Bureau of Mines,
SUDOC:	C 22.11:6362
Series:	Information circular / United States Department of Commerce, Bureau of Mines ;
Report Number:	6362
Subjects:	Respirators (Medical equipment)
	Breathing apparatus
	Mine rescue work--Equipment and supplies
	Gas masks
	Self-contained self-rescuer (Mine rescue equipment)
Link:	https://hdl.handle.net/2027/mdp.39015095084672