- Turquoise Mining District (Courtland-Gleeson Mining District)
| Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 361 Foord, E.E., et al (1983), Cuprian fraipontite and sauconite from the Defiance-Silver Bill Mines, Gleeson, AZ, Min.Rec.: 14: 131-132. |
Silver Bill Mine, Costello Mine group, Gleeson, Turquoise Mining District, Cochise County, Arizona, USA