Tetrahedrite Subgroup from Arkansas, USA
USA | |
| Smith, Arthur E. Jr. (1988) Arkansas Mineral Locality Index. Rocks & Minerals, 63 (2) 104-125 doi:10.1080/00357529.1988.11761826 |
| Rocks & Min.: 63:122 Dana 6: 140 & 692. |
| Miser & Purdue(1929). Rocks & Min.:63:123 |