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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 / Creator
- Available as
- Physical
Details
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- Creator
- by John R. Duda and E. L. Hemingway : Process Evaluation Group-MMRD
- Format
- Books
- Language
- English
- Contributors
- Publication
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- Washington : U.S. Dept. of the Interior, Bureau of Mines : for sale by the Supt. of Docs., U.S. Govt. Print. Off., 1976
- Physical Details
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- 3 unnumbered pages, 23 pages : illustrations ; 26 cm
- OCLC
- ocm02629650