Ludlamite from selected localities.
USA | |
| R&M 75:3 pp 156-169 |
| Campbell, T.J., Roberts, W.L. (1985) Mineral Localities in the Black Hills of South Dakota. Rocks & Minerals: 60(3): 109-118 (116). |
| Rocks & Minerals: 57: 160; &/or 60:110 & 112. |
USA | |
| R&M 75:3 pp 156-169 |
| Campbell, T.J., Roberts, W.L. (1985) Mineral Localities in the Black Hills of South Dakota. Rocks & Minerals: 60(3): 109-118 (116). |
| Rocks & Minerals: 57: 160; &/or 60:110 & 112. |
Big Chief Mine, Glendale, Keystone Mining District, Pennington County, South Dakota, USA