Betafite (of Hogarth 1977) from Granite Mountain area, Little Rock, Pulaski County, Arkansas, USA
USA | |
| Smith, Arthur E. Jr. (1988) Arkansas Mineral Locality Index. Rocks & Minerals, 63 (2) 104-125 doi:10.1080/00357529.1988.11761826 |
Henry Barwood - unpublished (2010) |