Trends in underground coal mining in Indiana / by Denver Harper.
| Uniform Title: | Geological Survey occasional paper ;
33. |
|---|---|
| Main Author: | |
| Language: | English |
| Published: |
Bloomington, Ind. :
State of Indiana,
1981.
|
| Series: | Geological Survey occasional paper ;
33. |
| Subjects: | |
| Physical Description: | 13 pages : illustrations, maps ; 28 cm. |
| Format: | Book |
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