Author: | Morrow, Alexander E. |
---|---|
Year: | 1959 |
Document Type: | USBI |
Issuing Agency: | U.S. Dept. of the Interior, Bureau of Mines, |
SUDOC: | I 28.27:7943 |
Series: | Information circular / United States. Bureau of Mines ; |
Report Number: | 7943 |
Subjects: | Respirators (Medical equipment) |
Breathing apparatus | |
Mine accidents | |
Link: | https://hdl.handle.net/2027/mdp.39015078454819 |