Author: | Muir, Neal M. |
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Year: | 1947 |
Document Type: | N/A |
SUDOC: | I 28.23:4075 |
Series: | United States Bureau of Mines Reports |
Report Number: | R. I. 4075 |
Subjects: | Boring. |
Fluorspar -- Illinois -- Hardin County. | |
Mines and mineral resources -- Illinois -- Hardin County. | |
Link: | http://digital.library.unt.edu/ark:/67531/metadc38472/ |