| Additional Authors: | Brewer, R. E., Ode, W. H., Wolfson, D. E., Birge, G. W., Reynolds, D. A., Davis, Joseph Dana, |
|---|---|
| Year: | 1949 |
| Document Type: | USBM |
| Issuing Agency: | U.S. Government Printing Office, Bureau of Mines, |
| Series: | Technical paper / Bureau of Mines ; |
| Report Number: | 712 |
| Subject: | Coal mines and mining |
| Link: | https://hdl.handle.net/2027/mdp.39015078487637 |