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Mexico | |
| Sotelo, C. M. (2016). Geology and mineralization controls surrounding the Palmarejo mining district-A compilation of remote and hands on exploration techniques. The University of Texas at El Paso. |
| Richard Dale Collection |
| Singer, D.A., Berger, V.I., Moring, B.C. (2008) Porphyry copper deposits of the world: Database and grade and tonnage models, 2008. Open-File Report 2008-1155 Espinosa Perea, V. J. (1999). Magmatic evolution and geochemistry of the Piedras Verdes deposit, Sonora, Mexico. MS thesis University of Arizona |