Specularite from selected localities.
USA | |
| Keith, Stanton B. (1974), AZ Bur. of Geol. & Min. Technology, Geol. Survey Br. Bull. 189, Index of Mining Properties in Pima County, AZ: 133 (Table 4); Wilson, E.D. (1950): 50-51; Cummings & Romalo (1950); Arizona Bureau of Mines file data. |
Singer, D.A., Berger, V.I., and Moring, B.C. (2008): US Geological Survey Open-File Report 2008-1155. | |
| Singer, D.A., Berger, V.I., and Moring, B.C. (2005): USGS Open-File Report 05-1060 |