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Portugal | |
| Manuel Maia's mineral colection |
| Neiva, A. M. R., Silva, M. M. V. G., Antunes, I. M. H. R., & Ramos, J. M. F. (2000). Phosphate minerals of some granitic rocks associated quartz veins from northern and central Portugal. |
| Hugo Lobo, Colecção |
| |
| Bull. Minéral. , 1987, 110, pp. 613-622. |
Seixigal, Vidago, Chaves, Vila Real, Portugal