| Author: | Bishop, O. M. |
|---|---|
| Additional Authors: | Needham, A. B. |
| Year: | 1949 |
| Document Type: | BMRA |
| Issuing Agency: | U.S. Dept. of the Interior, Bureau of Mines, |
| SUDOC: | I 28.23:4434 |
| Series: | Report of investigations / United States Department of the Interior, Bureau of Mines ; |
| Report Number: | 4434 |
| Subject: | Fluorspar--Illinois--Pope County |
| Link: | https://hdl.handle.net/2027/mdp.39015078495754 |