| Author: | Adams, William W. | 
|---|---|
| Additional Authors: | Gerry, L. S. | 
| Year: | 1931 | 
| Document Type: | USBM | 
| Issuing Agency: | U.S. Dept. of the Interior, Bureau of Mines, | 
| SUDOC: | C 22.5:509 | 
| Series: | Technical paper / Dept. of the Interior, Bureau of Mines ; | 
| Report Number: | 509 | 
| Subjects: | Explosives | 
| Coal mine accidents | |
| Links: | https://hdl.handle.net/2027/mdp.39015077559139 | 
| https://hdl.handle.net/2027/mdp.39015086470948 |