A cost comparison of selected coal mines from Australia, Canada, Colombia, South Africa, and the United States.
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| Corporate Author: | |
|---|---|
| Format: | Book |
| Language: | English |
| Published: |
[Washington, D.C.] :
United States Dept. of the Interior, Bureau of Mines,
1993.
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| Series: | Special publications.
Special publication (United States. Bureau of Mines). |
| Subjects: | |
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