Gypsum from selected localities.
USA | |
| P. Cristofono, T. Mortimer, J.W. Nizamoff, A. Wilken, and R. Wilken (2011) The 38th Rochester Mineralogical Symposium, April 14-17, 2011, lecture abstracts, page 17-18. |
| 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. |