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USA | |
| Sherwood, Mark D., Williams, Glenn A. (1998) Missouri Mineral Locality Index. Rocks & Minerals, 73 (2) 98-117 doi:10.1080/00357529809603046 |
| Sherwood, Mark D., Williams, Glenn A. (1998) Missouri Mineral Locality Index. Rocks & Minerals, 73 (2) 98-117 doi:10.1080/00357529809603046 |
| Sherwood, Mark D., Williams, Glenn A. (1998) Missouri Mineral Locality Index. Rocks & Minerals, 73 (2) 98-117 doi:10.1080/00357529809603046 |
| Sherwood, Mark D., Williams, Glenn A. (1998) Missouri Mineral Locality Index. Rocks & Minerals, 73 (2) 98-117 doi:10.1080/00357529809603046 Econ Geol (1992) 87:113-124 |
| Jensen (1978) Minerals of New York State, p.46 |
| Carlson, Ernest H. (2015) Minerals of Ohio. Bulletin 69 (2nd ed.) Ohio Division of Geological Survey |
| Carlson, Ernest H. (2015) Minerals of Ohio. Bulletin 69 (2nd ed.) Ohio Division of Geological Survey |
| Anderson, Violet (1979) Microminerals (Column) The Mineralogical Record, 10 (5) 297-300 |
| Carlson, Ernest H. (2015) Minerals of Ohio. Bulletin 69 (2nd ed.) Ohio Division of Geological Survey |
| Carlson, Ernest H. (2015) Minerals of Ohio. Bulletin 69 (2nd ed.) Ohio Division of Geological Survey |
| Carlson, Ernest H. (2015) Minerals of Ohio. Bulletin 69 (2nd ed.) Ohio Division of Geological Survey |
| Am Min 35:43-50 |
| Carlson, Ernest H. (2015) Minerals of Ohio. Bulletin 69 (2nd ed.) Ohio Division of Geological Survey |
| Carlson, Ernest H. (2015) Minerals of Ohio. Bulletin 69 (2nd ed.) Ohio Division of Geological Survey |
| Am Min 35:43-50 |
| Am Min 35:43-50 |
| Ref. Mineral Collecting in Pennsylvania Lapham, Geyer, 1965 pgs. 29-30 Am Min 35:43-50 |
| Am Min 35:43-50 |
| Am Min 35:43-50 |
| Am Min 35:43-50 |
| Am Min 35:43-50 |
| Dague, J.A. (2003) Mudstones and Minerals: Friends of Mineralogy Pennsylvania Chapter Newsletter: 31 (3): 2-5. |
| Am Min 35:43-50 |
| Am Min 35:43-50 |
| American Mineralogist (1950): 35: 43-50. |
| Am Min 35:43-50 |
| Am Min 35:43-50 |
| El Goresy, A. (1965) Mineralbestand und Strukturen der Graphit- und Sulfideinschlüsse in Eisenmeteoriten Geochimica et Cosmochimica Acta 29 (10): 1131-1151. (Oct 1965) |
Negley strip mine, Negley, Columbiana County, Ohio, USA