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Argentina | |
| William T. Holser: Beryllium minerals in the Victorio Mountains, Luna County, New Mexico. AM 38, 519 ff. |
| Sureda, R., Lira, R., & Colombo, F. (2010). Gustavite, PbAgBi3S6-P21/c, with the bismuth and silver minerals at Los Guindos mining group, Pampa de Olaen, Córdoba, Argentina (31° 11'S/64° 33'W). Andean Geology, 33(1). |
| King, Van (n.d.) Personal communcation. |
| Milka K. de Brodtkorb (2002) Las Especies Minerales de la Republica Argentina. Vol. 1 (elements, sulphides and sulphosalts). (Asociacion Mineralogica Argentina) |
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Brazil | |
| A. C. Bastos Neto, V. P. Pereira, L. H. Ronchi, E. F. de Lima and J. C. Frantz (2009): The world-class Sn, Nb, Ta, F (Y, REE, Li) deposit and the massive cryolite associated with the albite-enriched facies of the Madeira A-type granite, Pitinga mining district, Amazonas State, Brazil. Canadian Mineralogist 47, 1329-1357. |
| Miranda, A. C. R. (2018). Caracterização da mineralização de estanho e índio do Maciço Sucuri, província estanífera de Goiás. Masters thesis, University of Brasilia |
| Bilal, E. (2013). Geochimie Et Conditions De Cristallisation Des Mineraux Du Groupe Dd L’Helvite. Revista Geonomos, 2(2)p1-13 Martin Slama collection |
| Rocks & Minerals (2009) 84:42-45 Moore, Thomas P. (2004) What's New in Minerals - Costa Mesa Show 2003. The Mineralogical Record, 35 (2) 143-145 |
- Vieirópolis pegmatite field
| e Souza, B. D. A., Manoel, I., Guimarães, I. D. P., Barreto, S. D. B., Santos, G. L., & Araújo Neto, J. F. D. (2020). Whole-rock and mineral chemistry characterization of contrasting granitoids, constraints on the source of the Vieirópolis NYF-type pegmatites, Northeastern Brazil. Brazilian Journal of Geology, 50. e Souza, M. B. D. A., França, R. H. M., & de Lira, L. C. M. (2016, July). Vieirópolis Pegmatite Field, Northwest of Paraíba State, Brazil: New Occurrences of Amazonite Pegmatites. In Second Eugene E. Foord Pegmatite Symposium (p. 24). |
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Peru | |
| Hyrsl, Jaroslav, Rosales, Zolina (2003) Peruvian Minerals: An Update [Peru]. The Mineralogical Record, 34 (3) 241-254 Hyrsl, Jaroslav, Rosales, Zolina (2003) Peruvian Minerals: An Update [Peru]. The Mineralogical Record, 34 (3) 241-254 Mineralogical Record 28, no. 4 (1997) |
| King, Van (n.d.) Personal communcation. |
Navegadora claim, Penha do Norte, Conselheiro Pena, Minas Gerais, Brazil