Supplemental list of respiratory protective devices approved by the Bureau of Mines :
additions to list published in Information Circular 7444 /
by L.B. Berger.

Description

Main Author

Berger, Lawrence Bursley.

Related Names

United States. Bureau of Mines.

Language(s)

English

Published

Washington, D.C. : U.S. Dept. of the Interior, Bureau of Mines, 1949.

Subjects

Respirators (Medical equipment)
Breathing apparatus.

Physical Description

3 p. : 26 cm.

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