Montmorillonite from Black Hills, USA
USA | |
| Rocks & Minerals: 60: 117-118. |
| Rocks & Minerals: 67(6): 380-388. |
Smith, Arthur E., Fritzsch, Eric (2000) SOUTH DAKOTA. Rocks & Minerals, 75 (3) 156-169 doi:10.1080/00357520009605635 |
USA | |
| Rocks & Minerals: 60: 117-118. |
| Rocks & Minerals: 67(6): 380-388. |
Smith, Arthur E., Fritzsch, Eric (2000) SOUTH DAKOTA. Rocks & Minerals, 75 (3) 156-169 doi:10.1080/00357520009605635 |