Comparison of Gas Masks, Hose Masks, and Oxygen-Breathing Apparatus

Author: Katz, S. H.
Year: 1923
Document Type: N/A
Series: Report of investigations (United States. Bureau of Mines)
Report Number: Serial No. 2489
Subjects: Mine safety.
Gas masks.
Breathing apparatus.
Link: http://digital.library.unt.edu/ark:/67531/metadc100849/

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