Summary of drifting and crosscutting cost data / by C.F. Jackson.
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| Other title: | Drifting and crosscutting data. |
| Format: | Government Document Book |
| Language: | English |
| Published: |
Washington, D.C. :
U.S. Dept. of the Interior, Bureau of Mines,
1935.
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| Series: | Information circular (United States. Bureau of Mines) ;
6825. |
| Subjects: |