Helvine from selected localities.
USA | |
| Smith, Arthur E. (2005): New Hampshire Mineral Locality Index (Rocks & Minerals 80:242-261) Dallaire, Donald (2022) Beryllium Minerals in New Hampshire. Rocks & Minerals, 97 (3) 208-235 doi:10.1080/00357529.2022.2028096 |
| Rocks & Min 80:245 |