Perthite from Glastonbury, Hartford County, Connecticut, USA
USA | |
| Barton, W. & C. E. Goldsmith (1968) New England Beryllium investigations. US Bureau Mines RI 7070 |
|
USA | |
| Barton, W. & C. E. Goldsmith (1968) New England Beryllium investigations. US Bureau Mines RI 7070 |
|