| Additional Authors: | Rutledge, John Joseph, |
|---|---|
| Year: | 1930 |
| Document Type: | USBM |
| Issuing Agency: | U.S. Bureau of Mines, |
| SUDOC: | C 22.5:465 |
| Series: | Technical paper / United States. Bureau of Mines ; |
| Report Number: | 465 |
| Subjects: | Coal--Analysis |
| Coal--Maryland | |
| Link: | https://hdl.handle.net/2027/mdp.39015077559667 |