| Author: | Katell, Sidney. | 
|---|---|
| Additional Authors: | Faber, John H. | 
| Year: | 1961 | 
| Document Type: | USBI | 
| Issuing Agency: | U.S. Dept. of the Interior, Bureau of Mines, | 
| SUDOC: | I 28.27:8020 | 
| Series: | Information circular / United States Department of the Interior, Bureau of Mines ; | 
| Report Number: | 8020 | 
| Subject: | Coal gasification, Underground--Cost of operation | 
| Link: | https://hdl.handle.net/2027/mdp.39015078461418 |