Assay of black sands / by Paul Hopkins.
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| Main Author: | |
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| Format: | Government Document Book |
| Language: | English |
| Published: |
[Washington, D.C.] :
United States Bureau of Mines,
1934.
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| Series: | Report of investigations (United States. Bureau of Mines) ;
3265. |
| Subjects: |
| Physical Description: | 5 pages ; 27 cm. |
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