Use of a type N miners' gas mask
| Author: | Katz, S. H. |
|---|---|
| Additional Authors: | McCaa, George S., |
| Year: | 1929 |
| Document Type: | MAIN |
| Issuing Agency: | U.S. Govt. Print. Off., |
| Series: | Miners' circular ; |
| Report Number: | 32 |
| Subject: | Gas masks |
| Link: | https://hdl.handle.net/2027/mdp.39015077562091 |