Copper from Illinois, USA
USA | |
| Rocks & Min.: 63:195 |
| U.S.G.S. Bulletin 255 |
| Rocks & Min.: 63:195 |
| Rocks & Minerals (1955) 30:370 |
| Smith, Arthur E. (2010) Illinois Mineral Locality Index. Rocks & Minerals, 85 (3) 206-219 doi:10.1080/00357521003727199 |