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Surface and underground coal mine equipment population, 1982
| Author: | Pojar, Michael G. |
|---|---|
| Year: | 1986 |
| Document Type: | USBI |
| Issuing Agency: | U.S. Dept. of the Interior, Bureau of Mines, |
| SUDOC: | I 28.27:9078 |
| Series: | Information circular / Bureau of Mines ; |
| Report Number: | 9078 |
| Subject: | Coal-mining machinery--United States |
| Link: | https://hdl.handle.net/2027/mdp.39015078459032 |
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