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USA | |
| Ronald A Sloto, The Mines and Minerals of Berks County, Pennnsylvania- p. 77 |
| The Mineralogy of Pennsylvania 1966-1975 Robert C. Smith II ( (quoted B. L. Miller 1912, p.114) (quoted B. L. Miller 1912, p.114) |
| The Mineralogy of Pennsylvania 1922 Samuel Gordon pg. 185 |
| Gordon: Mineralogy of Pennsylvania (1922) p. 186. |
| Mineralogy of Pennsylvania, S. Gordon, pg.186 |
| Joe Dunleavy (Pers. Comm.) |
| Gordon's Mineralogy of Pennsylvania (1922) p. 191 |
| Gordon, S.G. (1922) The Mineralogy of Pennsylvania. Special Publication No.1, The Academy of Natural Sciences of Philadelphia, 255 pages, at p.191. |
| Gordon, "Mineralogy of Pennsylvania" 1922 p. 193. |
| Rocks & Min.:62:176. |
| |
| Rocks & Min.: 59:109-120 & 62:176-178. |
| Rocks & Min.: 59:109-120 & 62:176-178. |
- Swarthmore (Borough of Swarthmore)
| Rocks & Min.: 59:109-120 & 62:176-178. |
| Min. Col. PA Geyer, Smith, Barnes Pgs. 114-116 |
| King, Vandall T., 2002, Transparent Micro Staurolite Crystals from Trainer, Pennsylvania, 29th Rochester Mineralogical Symposium Program and Abstracts, p. 13. |
- Upper Chichester Township
| Ref.) The Minerology of Pennsyvania Samuel S. Gordon - 1922 Pg. 197-198 |
- Upper Providence Township
| Mineralogy of Pennsylvania, S. Gordon, pg. 200 |
| Gordon, S.G. (1922) "The Mineralogy of Pennsylvania," Special Publication No. 1, The Academy of Natural Sciences of Philadelphia: p. 213. |
| Stewart Wise collection |
| Mineralogy of Pennsylvania-1922 Samuel S. Gordon, pg. 234 |
| Mineralogy of Pennsylvania-1922 Samuel S. Gordon, pg. 221-222 |
| Gordon, 1922. Mineralogy of Pennsylvania |
| Ref.: Gordon, S.G. (1922) "The Mineralogy of Pennsylvania," Special Publication No. 1, The Academy of Natural Sciences of Philadelphia: p. 125. |
| Mineralogy of Pennsylvania-1922 Samuel S. Gordon, pg. 229 |
| Samuel G. Gordon (1922) "Mineralogy of Pennsylvania" p. 225. |
| Samuel G. Gordon (1922) "Mineralogy of Pennsylvania" p. 225. |
| Mineralogy of Pennsylvania, S. G. Gordon - 1922, p. 226. |
| Gordon, "Mineralogy of Pennsylvania," 1922 p. 228. |
| Gordon, 1922. The Mineralogy of Pennsylvania |
Deshong's Quarry, Leiperville, Ridley Township, Delaware County, Pennsylvania, USA