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Mexico | |
| Tom Gibson (2011) National Instrument 43-101 - El Tigre Silver Property Municipio de Nacozari de Garcia Sonora, Mexico Amended Technical Report |
| Garcia y Barragan, J. C. (1975). Geologic and radiometric study in the Picacho, Arizpe's Municipality, Sorora (Mexico) area (No. INIS-MF--2060). Universidad Nacional Autonoma de Mexico. |
| Garrett, D.E. (1998): Borates - Handbook of Deposits, Processing, Properties and Use. Academic Press (San Diego, London), 475 pp. |
| Panczner, William D. (1987) Minerals of Mexico. Van Nostrand Reinhold Company Inc., New York. |