|
USA | |
| [var. Perthite] Meyers, T.R., Stewart, G.W. (1956) The Geology of New Hampshire - Part III: Minerals and Mines. New Hampshire Department of Resources and Economic Development. |
| [var. Perthite] Cameron, Eugene N., , (1954) Pegmatite investigations, 1942-45, in New England. Professional Paper 255. US Geological Survey doi:10.3133/pp255 |
| [var. Perthite] Cameron, Eugene N., , (1954) Pegmatite investigations, 1942-45, in New England. Professional Paper 255. US Geological Survey doi:10.3133/pp255 |
| [var. Perthite] Cameron, Eugene N., , (1954) Pegmatite investigations, 1942-45, in New England. Professional Paper 255. US Geological Survey doi:10.3133/pp255 |
| [var. Perthite] Cameron, Eugene N., , (1954) Pegmatite investigations, 1942-45, in New England. Professional Paper 255. US Geological Survey doi:10.3133/pp255 |
| [var. Perthite] Barton, W. & C. E. Goldsmith (1968) New England Beryllium investigations. US Bureau Mines RI 7070 |
| [var. Perthite] Cameron, Eugene N., , (1954) Pegmatite investigations, 1942-45, in New England. Professional Paper 255. US Geological Survey doi:10.3133/pp255 |
| A.Mathauser collection |
| |
| |
| |
| |
| |
| |
| [var. Perthite] Page & Larrabee, 1962. Beryl Resources of NH (USGS Prof. Paper 353) USGS Prof Paper 353 |
| [var. Perthite] Cameron, Eugene N., , (1954) Pegmatite investigations, 1942-45, in New England. Professional Paper 255. US Geological Survey doi:10.3133/pp255 |