Columbite-(Fe)-Columbite-(Mn) Series from Grafton County, New Hampshire, USA
USA | |
| Cameron, Eugene N., , (1954) Pegmatite investigations, 1942-45, in New England. Professional Paper 255. US Geological Survey doi:10.3133/pp255 |
| Rocks & Min 80:252 |
USA | |
| Cameron, Eugene N., , (1954) Pegmatite investigations, 1942-45, in New England. Professional Paper 255. US Geological Survey doi:10.3133/pp255 |
| Rocks & Min 80:252 |