List of respiratory protective devices approved by the Bureau of Mines

Author: Pearce, S. J.
Additional Authors: Berger, L. B.
Year: 1950
Document Type: USBI
Issuing Agency: U.S. Dept. of the Interior, Bureau of Mines,
SUDOC: I 28.27:7570
Series: Information circular / United States Department of the Interior, Bureau of Mines ;
Report Number: 7570
Subjects: Respirators (Medical equipment)
Breathing apparatus
Link: https://hdl.handle.net/2027/mdp.39015078455519

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