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USA | |
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| Willams, george Huntinton (1887) Notes on the Minerals Occurring in the Neighborhood of Baltimore, Johns Hopkins, Baltimore, pp. 18 |
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| Bernstein, L.R. (1976) Minerals of Washington D.C. and vicinity. U.S. Geological Survey Open-File Report 76-849, 183 pages.
Rocks & Minerals 10, 110. |
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| Ref: Minerals of the Washington, D.C Area. |
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| Ref: Minerals of the Washington, D.C Area. |
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| Ostrander, C. W. & W. E. Price (1940) Minerals of Maryland: Natural History Society of Maryland , 92 p. |
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| Bernstein, Lawrence (1976) Minerals of Washington D.C. and vicinity: U.S. Geological Survey: Open File Report 76-849, 183 p. |
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| (2005) Mineral Resources Data System (MRDS), US Geological Survey. |
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| Roswell Miller III (1945) The heavy minerals of Florida beach and dune sands. American Mineralogist, 30, 65-75. |
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| (2005) Mineral Resources Data System (MRDS), US Geological Survey.
(2005) Mineral Resources Data System (MRDS), US Geological Survey. |
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| W. Harold Tomlinson (1946) Rutile in Harford County, Maryland. American Mineralogist, 31, 322-325. |
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| Bernstein, Lawrence (1980) Minerals of the Washington D. C. area: Maryland Geological Survey Educational Series 5, 148 p. |
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| Minerals of the Washington D.C. area |
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| Pearre, N. & A. V. Heyl (1960) Mineral deposits in serpentine rocks of the Piedmont Upland, Maryland, Pennsylvania and Delaware: U. S. Geological Survey: Bulletin 1082K: 707-833. |
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| Parker, Fred J. (2005) The minerals of the Hunting Hill quarry, Rockville, Maryland. The Mineralogical Record, 36 (5) 435-446 |
Dinning Rutile prospect, Clermont Mills, Harford County, Maryland, USA