Gummite from selected localities.
USA | |
| U.S Bureau of Mines/Spatial Data from the Minerals System/Mineral Industry Location System(Mas/Mils)CD-Rom,Sep,1995 |
| Smithsonian Institution Mineral Reference Collection No.105590-00 |
| Frondel,Clifford (1956) Mineral Composition of Gummite;The American Mineralogist,Vol.41,No.7-8,July-Aug.1956 |
Ross,Clarence S.,(1937) Sphalerite from a Pegmatite near Spruce Pine,North Carolina:The American Mineralogist,May,1937 | |
Rocks & Min.: 11:76. |