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Economic evaluation of borehole and conventional mining systems in phosphate deposits /
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| Main Author: | |
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| Other Authors: | |
| Format: | Book |
| Language: | English |
| Published: |
[Washington] :
U.S. Dept. of the Interior, Bureau of Mines,
1983.
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| Series: | Information circular (United States. Bureau of Mines) ;
8929 |
| Subjects: | |
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| Physical Description: | ii, 34 p. |
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