|
USA | |
| Ostrander & Price (1940), Minerals of Maryland: 27. Rocks & Min.: 21:144-145 |
| Heyl, A. & Pearre, N (1965) Copper, zinc, lead, iron cobalt and barite deposits of the Piedmont Upland in Maryland: Maryland Geological Survey: Bulletin 28: 55-56. |
| Jat Thompson Collection |
| Econ Geol (1989) 84:663-675 Mines of the Washington D.C Area |
| Rocks & Min.: 22:1023. |
| Jat Thompson Collection |
| Heyl, A. & Pearre, N (1965) Copper, zinc, lead, iron cobalt and barite deposits of the Piedmont Upland in Maryland: Maryland Geological Survey: Bulletin 28, 72 p. |
| Ostrander, C. W. & W. E. Price (1940) Minerals of Maryland: Natural History Society of Maryland , 92 p. |
| Dana 6:1071. |
| Dana 6: 1071 Rocks & Min.: 11:27, 121. |
| Stuart Herring |
| Rocks & Min.: 22:1023. |
| Heyl, A. & Pearre, N (1965) Copper, zinc, lead, iron cobalt and barite deposits of the Piedmont Upland in Maryland: Maryland Geological Survey: Bulletin 28, 72 p. |
| Heyl, A. & Pearre, N (1965) Copper, zinc, lead, iron cobalt and barite deposits of the Piedmont Upland in Maryland: Maryland Geological Survey: Bulletin 28, 72 p. |
| Dana 6:1071. |
| Rocks & Min.: 21:665. |
| Rocks & Min.: 22: 226-227. |
| Heyl, A. & Pearre, N (1965) Copper, zinc, lead, iron cobalt and barite deposits of the Piedmont Upland in Maryland: Maryland Geological Survey: Bulletin 28, 72 p. |
| Heyl, A. & Pearre, N (1965) Copper, zinc, lead, iron cobalt and barite deposits of the Piedmont Upland in Maryland: Maryland Geological Survey: Bulletin 28, 72 p. |
| Parker, Fred J. (2005) The minerals of the Hunting Hill quarry, Rockville, Maryland. The Mineralogical Record, 36 (5) 435-446 |
Mineral Hill Mine, Louisville, Carroll County, Maryland, USA