‡Ref.: Ransome, F.L. (1922), Ore deposits of the Sierita Mountains, Pima County, Arizona, USGS Bull. 725-J: 407-428.
Webber, B.N. (1929), Marcasite in the contact metamorphic ore deposits of the Twin Buttes District, Pima County, Arizona, Economic Geology: 24: 304-310.
Galbraith, F.W. (1947), Minerals of Arizona, Arizona Bureau of Mines Bull. 153: 16, 24.
Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd. ed.: 123, 163, 248, 290.
Mineral List
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