| Author: | Pettit, Robert F. | 
|---|---|
| Additional Authors: | Reynolds, Burton M., Calhoun, W. A. | 
| Year: | 1957 | 
| Document Type: | USBI | 
| Issuing Agency: | U.S. Dept. of the Interior, Bureau of Mines, | 
| SUDOC: | I 28.27:7807 | 
| Series: | Information circular / United States Department of the Interior, Bureau of Mines ; | 
| Report Number: | 7807 | 
| Subjects: | Mines and mineral resources--Cost of operation | 
| Mines and mineral resources--Missouri--Saint Francois County--Management | |
| Iron mines and mining--Missouri--Saint Francois County | |
| Link: | https://hdl.handle.net/2027/mdp.39015078459867 |