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Spain | |
| Grupo Mineralogista de Madrid(1994) Don Benito, uranio en la pizarra. Bocamina, Vol.0, p 39. (in Spanish) |
| www.foro-minerales.com (n.d.) https://www.foro-minerales.com/forum/viewtopic.php?p=141369#141369 |
| D Respino collection |
| Frost, R., Kristof, J., Martens, W., Weier, M., & Horváth, E. (2006). Thermal decomposition of sabugalite: A controlled rate thermal analysis study. Journal of thermal analysis and calorimetry, 83(3), 675-679. A. M. I. Martins collection |
El Lobo Mine, Quintana de la Serena, Badajoz, Extremadura, Spain