Pyrite from Williamson Canyon, Cobre Grande Mountain, Aravaipa, Aravaipa Mining District, Graham County, Arizona, USA
USA | |
| Wilson, E.D., et al (1950), Arizona zinc and lead deposits, part I, AZ Bur. Mines Bull. 156: 59. |
Simons, F.S. (1964), Geology of the Klondyke quadrangle, Graham and Pinal Counties, Arizona, USGS PP 461: 141. MRDS file #10039450. |