List of permissible self-contained oxygen breathing apparatus, gas masks, and hose masks.

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Bibliographic Details
Online Access:	Full Text (via ProQuest)
Corporate Author:	United States. Bureau of Mines
Format:	Government Document eBook
Language:	English
Published:	[Washington] : [s.n.], 1931.
Subjects:	Mines and mineral resources. Gas masks.

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Full Text (via ProQuest)

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Call Number:	C22.11-6494
C22.11-6494	Available