Permissible mine equipment approved by the Bureau of Mines during 1967-68 :a supplement to Bulletin 543 and Information circulars 8220, 8299, and 8372
| Author: | Lee, F. R. |
|---|---|
| Year: | 1970 |
| Document Type: | USBI |
| Issuing Agency: | U.S. Dept. of the Interior, Bureau of Mines, |
| SUDOC: | I 28.27:8463 |
| Series: | Information circular / Bureau of Mines ; |
| Report Number: | 8463 |
| Subjects: | Mine safety |
| Mining machinery | |
| Link: | https://hdl.handle.net/2027/mdp.39015077577859 |