|
USA | |
| American Mineralogist, Volume 74, pages 132-140, 1989 |
| Rocks & Min.: 63:108. |
| Owens, Don R. (1995) Minerals of the Wilson Springs Vanadium Mines, Potash Sulphur Springs, Arkansas. Rocks & Minerals: 70(3): 154-170. Howard, J. Michael |
| Henry Barwood - unpublished (2010) |
| Ron Layton Collection |
| Howard, J. Michael (2007) Bulletin Vol. 23, Mineral Species of Arkansas - A Digest (2nd ed.) Arkansas Geological Commission Howard, J. Michael (1987) Mineral Species of Arkansas - A Digest. Bulletin Vol. 23 (1st ed.) Arkansas Geological Commission |
Union Carbide Mine, Wilson Springs, Garland County, Arkansas, USA