| References: | Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 128, 173, 196, 286, 417; Bancroft, H. (1911), Reconnaissance of the ore deposits in northern Yuma Co., AZ, USGS Bull. 451; Cummings, J.B. (1946b), Exploration of New Planet iron deposit, Yuma Co., AZ, US Bur. Mines Rept. Inv. 3982; McCarn, H.L. (1904), The Planet copper mine, Engr. Mining Jour.: 78: 26; Galbraith, F.W. & D.J. Brennan (1959), Minerals of AZ: 110. |