 |
|
Timbering regulations in certain coal mines of Pennsylvania, West Virginia, and Ohio
| Author: | Paul, J. W. |
|---|---|
| Additional Authors: | Calverley, Joseph Gladstone,, Sibray, Donald Loammi, |
| Year: | 1930 |
| Document Type: | USBM |
| Issuing Agency: | U.S.Bureau of Mines, |
| SUDOC: | C 22.5:485 |
| Series: | Technical paper / United States. Bureau of Mines ; |
| Report Number: | 485. |
| Subjects: | Coal mines and mining--Pennsylvania |
| Mine timbering | |
| Coal mines and mining--West Virginia | |
| Coal mines and mining--Ohio | |
| Link: | https://hdl.handle.net/2027/mdp.39015077559428 |
Search developed and maintained by the University of Washington Libraries
Copyright 2010