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Ecuador | |
| Aspden, J.A., Bonilla, W., Duque, P., (1995): The El Oro metamorphic complex, Ecuador: geology and economic mineral deposits. Overseas Geology and Mineral Resources 67, pp. 63, 1 map, British Geological Survey publ., Nottingham. |
| Aspden, J.A., Bonilla, W., Duque, P., (1995): The El Oro metamorphic complex, Ecuador: geology and economic mineral deposits. Overseas Geology and Mineral Resources 67, pp. 63, 1 map, British Geological Survey publ., Nottingham. |
| Alejandro Félix collection. |