Gold in porphyry copper systems.
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| Other Authors: | |
| Format: | Government Document Book |
| Language: | English |
| Published: |
[Reston, Va.] :
Dept. of the Interior, U.S. Geological Survey ;
1990.
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| Series: | U.S. Geological Survey bulletin ;
1857-E. Geology and resources of gold in the United States ; ch. E. |
| Subjects: |
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