Mica Group from Pennsylvania, USA
USA | |
| (prospector field notes) |
| David S. Bernstein- January 2010 |
| Gordon, Samuel G. (1922), Mineralogy of PA |
| The Mineralogy of Pennsylvania 1966-1975: Robert C. Smith II |
| www.the-vug.com (n.d.) http://www.the-vug.com/vug/prospectparkkyanitecollect.html |
| Gordon - Min. Penn. (1922) p. 204 |
| Min, Col. in PA-1976 Geyer, Smith, Barnes. pgs. 139-141 |
| www.jonesgeo.com (2011) http://www.jonesgeo.com/codorus.htm |