Smithsonite from Graham County, Arizona, USA
USA | |
| Denton, T.C. (1947), Aravaipa lead-zinc deposits, Graham County, Ariz., US Bur. Mines Rept. Investigation 4007: 5. |
| Simons, F.S. (1964), Geology of the Klondyke quadrangle, Graham and Pinal Cos., AZ, USGS PP 461. |