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Basic estimated capital investment and operating costs for underground bituminous coal mines developed for longwall mining :mines with annual production 1.3 and 2.6 million tons by longwall mining from a 48-inch coalbed
| Author: | Duda, John R. |
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| Additional Authors: | Hemingway, E. L., |
| Year: | 1976 |
| Document Type: | USBI |
| Issuing Agency: | U.S. Dept. of the Interior, Bureau of Mines : |
| SUDOC: | I 28.27:8720 |
| Series: | Information circular - Bureau of Mines ; |
| Report Number: | 8720 |
| Subjects: | Coal mines and mining--United States--Cost of operation |
| Bituminous coal--Costs | |
| Link: | https://hdl.handle.net/2027/mdp.39015078461962 |
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