Pyrite from Marion 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 |
| Rocks & Minerals (1989) 64:284-292 |
| Rocks & Min.: 64(4):290. |
USA | |
| Smith, Arthur E. Jr. (1988) Arkansas Mineral Locality Index. Rocks & Minerals, 63 (2) 104-125 doi:10.1080/00357529.1988.11761826 |
| Rocks & Minerals (1989) 64:284-292 |
| Rocks & Min.: 64(4):290. |