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USA | |
| Morrill & Chaffee, 1957. VT Mines & Mineral Localities |
| Johannes Swarts collection |
| Rocks & Min. Vol. 71, (1996) Mineralogical Record 22:384 |
| J. Swarts collection |
| Rocks & Min. Vol. 71, (1996) |
| Morrill & Chaffee, 1957. VT Mines & Mineral Localities |
| Nicolay & Stone (1967), Rocks & Minerals: A Guide For Collectors of the Eastern US |
| Robinson, Douglas (1996). Refining Local Mineralogy: Two Calcite Deposits in Westminster, Windham County, Vermont, Mineral News 12(5): 1-2. |
| Robinson, Douglas (1996). Refining Local Mineralogy: Two Calcite Deposits in Westminster, Windham County, Vermont, Mineral News 12(5): 1-2. |
| Morrill & Chaffee, 1957. VT Mines & Mineral Localities |
| Bray and Emery, 1922. Mineralization Along Dikes of Southern Vermont |
US highway 5 road cut, Putney, Windham County, Vermont, USA