| Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 116, 326, 401 Perry, D.V. (1969), Skarn genesis at the Christmas mine, Gila Co., AZ, Econ.Geol.: 64: 255-270 Willden, Ronald (1964) Geology of the Christmas quadrangle, Gila and Pinal Counties, Arizona: U.S. Geological Survey Bulletin 1161-E, p. E1-E64 Peterson, Nels P. & Swanson (1956), USGS Bull. 1027-H, Geology of the Christmas Copper Mine, Gila Co., AZ: 363 |