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Mining Methods and Costs at Crystal-Victory and Minerva Number 1 Fluorspar Mines of Minerva Oil Company, Hardin County, Illinois
| Author: | Montgomery, Gill |
|---|---|
| Additional Authors: | Daly, J. J. |
| Year: | 1960 |
| Document Type: | N/A |
| SUDOC: | I 28.27:7956 |
| Series: | Information circular (United States. Bureau of Mines) |
| Report Number: | I. C. 7956 |
| Subjects: | Mining engineering. |
| Fluorspar. | |
| Mineral industries -- Illinois. | |
| Link: | https://digital.library.unt.edu/ark:/67531/metadc170719/ |
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