- General Lamadrid Department
| Simon, Grigore, Kesler, Stephen E., Essene, Eric J. (1997) Phase relations among selenides, tellurides, and oxides; II, Applications to selenide-bearing ore deposits. Economic Geology, 92 (4) 468-484 doi:10.2113/gsecongeo.92.4.468 Palache, C., Berman, H., & Frondel, C. (1951), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana, Yale University 1837-1892, Volume II: 639 (as "Sierra de Umango") American Mineralogist, 35 (1950), 354 (as "Sierra de Umango") |
Tumiñico Mine, Sierra de Cacho, Villa Castelli, General Lamadrid Department, La Rioja Province, Argentina