Brown, R.L., 1926, Geology and ore deposits of the Twin Buttes district: Tucson, University of Arizona, M.S. thesis, 40 p. Authors Brown, R.L. Publication Date 1926 Citation Tucson, University of Arizona, M.S. thesis, 40 p. State AZ Province BR County PM Placenames Sierrita Mts. Keywords Mineral District Areal Porphyry Copper More Keywords Mineral District, Areal, Porphyry Copper, AzGeoBib RefNum 1375