Gypsum from Shullsburg area, Upper Mississippi Valley Mining District, Lafayette County, Wisconsin, USA
USA | |
| Luetcke, Rolf (n.d.) Personal communication. |
Cordua, William S. (1998) Wisconsin Mineral Locality Index. Rocks & Minerals, 73 (6) 378-399 doi:10.1080/00357529809603078 |
Little Giant Mine, Shullsburg area, Upper Mississippi Valley Mining District, Lafayette County, Wisconsin, USA