| Author: | Hopkins, G. R. | 
|---|---|
| Year: | 1931 | 
| Document Type: | USBI | 
| Issuing Agency: | U.S. Dept. of Commerce, Bureau of Mines, | 
| SUDOC: | C 22.11:6509 | 
| Series: | Information circular / Bureau of Mines ; | 
| Report Number: | 6509 | 
| Subject: | Petroleum refineries--United States | 
| Link: | https://hdl.handle.net/2027/mdp.39015077576745 |