Respiratory protective devices approved by the Bureau of Mines as of October 1, 1965

Author:	Schutz, Robert H.
Additional Authors:	Kloos, E. J., Ferber, B. I.
Year:	1966
Document Type:	USBI
Issuing Agency:	U.S. Dept. of the Interior, Bureau of Mines,
SUDOC:	I 28.27:8281
Series:	Information circular / Bureau of Mines ;
Report Number:	8281
Subjects:	Breathing apparatus
	Mine safety
Link:	https://hdl.handle.net/2027/mdp.39015078464503