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USA | |
| Warren Cummings, Geologist, NJDOT, personal communication, 2008. |
| Mineralogy of Pennsylvania-1922 Samuel S. Gordon, pg. 167 |
| Mineralogy of Pennsylvania-1922 Samuel S. Gordon, pg. 170 |
| Ella Masciulli Collection |
| Mineral Collecting in PA (1976) Geyer, Smith, Barnes, pgs. 73-75 |
| Lapham & Geyer, 1965. Mineral Collecting in Pennsylvania |
| Colflesh, S. (2010) Mineral News, 26, #5, 2. |
| Rob Lavinsky |
| Joe Dunleavy (Pers. Comm.) |
| Rocks & Min.: 58: 265-266. |
| |
- Upper Providence Township
| Mineralogical Record 22:384s |
| Samuel S. Gordon (1922) Mineralogy of Pennsylvania. pg. 234 |
| Mineralogy of Pennsylvania-1922 Samuel S. Gordon, pg. 229 |
| White, J.S. (2017) The Smoky Mountain Crystal prospect, Schuylkill County, Pennsylvania. Rocks and Minerals: 92(4): 366-373. |
| White, J.S. (2017). The Smoky Mountain Crystal Prospect, Schuylkill County, Pennsylvania. Rocks & Minerals 92 (4): 366-373. |
Shaw and Esrey's Quarry, Chester Township, Delaware County, Pennsylvania, USA