|
USA | |
| (1917) Useful minerals of the United States. Bulletin Vol. 624. US Geological Survey doi:10.3133/b624 |
| Mines of the Washington D.C Area |
| Dana 6:1071. |
| Dana 6: 1071 Rocks & Min.: 11:27, 121. |
| Rocks & Min.: 21:665. |
| Mines of the Washington D.C Area |
| Pearre and Heyl (1965) |
| Gems and Minerals of America- Jay Ellis Ransom-1974 |
| (2005) Mineral Resources Data System (MRDS), US Geological Survey. |
| Bernstein, Lawrence (1980) Minerals of the Washington D. C. area: Maryland Geological Survey Educational Series 5, 148 pages. |
| Rocks & Min.: 14:305. |
| (2005) Mineral Resources Data System (MRDS), US Geological Survey. |
| Ostrander, C. W. & W. E. Price (1940) Minerals of Maryland: Natural History Society of Maryland , 92 p. |
| Ref.: Minerals of the Washington D.C. Area. |
| Sorrell, Steve (n.d.) Personal communication. Sorrell, Steve (n.d.) Personal communication. |
| Rocks & Min.:11:121 14:299. |
| Weed, W.H., (1905) Notes on the gold veins near Great Falls, Maryland : U.S. Geol. Survey Bull. 260, p. 128-131. Rocks & Min.: 11:121 14:301 22:834. |
| Reed, J.C. Jr. & J.C. Reed (1969) Gold veins near Great Falls, Maryland: U. S. Geological Survey Bulletin 1286, 22 p. Ulke, Titus (1939) Gold mining past and present near Washington, D. C. :Rocks & Minerals: 14 (10): 299. |
| MD Geol. Sur.:Vol. VIII:151(1909). Weed, W.H., (1905) Notes on the gold veins near Great Falls, Maryland : U.S. Geol. Survey Bull. 260, p. 128-131. |
| Rocks & Min.: 14:305. |
| Rocks & Min.:11:8 & 121 14:305. |
| (1917) Useful minerals of the United States. Bulletin Vol. 624. US Geological Survey doi:10.3133/b624 |
Maryland Mine, Potomac, Montgomery County, Maryland, USA