Use of respiratory protective devices under abnormal air pressure

Author:	Griffith, F. E.
Additional Authors:	Schrenk, H. H.
Year:	1940
Document Type:	BMRA
Issuing Agency:	U.S. Dept. of the Interior, Bureau of Mines,
SUDOC:	I 28.23:3488
Series:	Report of investigations / United States Department of the Interior, Bureau of Mines ;
Report Number:	3488
Subjects:	Breathing apparatus
	Mine safety
Link:	https://hdl.handle.net/2027/mdp.39015078491860