| Author: | Fieldner, Arno Carl, | 
|---|---|
| Year: | 1931 | 
| Document Type: | BMRA | 
| Issuing Agency: | United States Bureau of Mines, | 
| SUDOC: | C 22.12:3079 | 
| Series: | Report of investigations / United States Department of the Interior, Bureau of Mines ; | 
| Report Number: | 3079 | 
| Subjects: | Bituminous coal | 
| Coal-tar | |
| Coal industry and trade | |
| Link: | https://hdl.handle.net/2027/mdp.39015077567355 |