Columbite-Tantalite from selected localities.
USA | |
| Cameron et al. (1954) USGS Professional Paper 255 |
| Cameron, Eugene N. and others. (1954) PEGMATITE INVESTIGATIONS 1942-45 NEW ENGLAND. U.S. Geological Survey, Professional Paper 255. |
USA | |
| Cameron et al. (1954) USGS Professional Paper 255 |
| Cameron, Eugene N. and others. (1954) PEGMATITE INVESTIGATIONS 1942-45 NEW ENGLAND. U.S. Geological Survey, Professional Paper 255. |