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List of respiratory protective devices approved by the Bureau of Mines
| Author: | Pearce, S. J. |
|---|---|
| Additional Authors: | Berger, Lawrence Bursley. |
| Year: | 1952 |
| Document Type: | USBI |
| Issuing Agency: | U.S. Dept. of the Interior, Bureau of Mines, |
| SUDOC: | I 28.27:7636 |
| Series: | Information circular / Bureau of Mines ; |
| Report Number: | 7636. |
| Subjects: | Respirators (Medical equipment) |
| Breathing apparatus | |
| Link: | https://hdl.handle.net/2027/mdp.39015078455881 |
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