Respirators approved by the Bureau of Mines as of May 24, 1972 :a revision of Information circular 8436

Author:	Kloos, E. J.
Additional Authors:	Schutz, Robert H.
Year:	1972
Document Type:	USBI
Issuing Agency:	U.S. Dept. of the Interior, Bureau of Mines,
SUDOC:	I 28.27:8559
Series:	Information circular / United States Department of the Interior, Bureau of Mines ;
Report Number:	8559
Subjects:	Mine safety
	Breathing apparatus
	Respirators (Medical equipment)
Link:	https://hdl.handle.net/2027/mdp.39015078516039