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Spain | |
| Weibel, M. (1955): Contributions to Mineralogy and Petrology 4, 379-411. |
| Weibel, M. (1955): Contributions to Mineralogy and Petrology 4, 379-411. |
| Viñals, J. and Calvo, M. (2011). Secondary phosphates of La Paloma mine, Zarza la Mayor, Cáceres, Spain. Mineral Up 2 (5), 8-31. |