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List of minerals arranged by Strunz 10th Edition classification
No entries listed.
Pearre, N. C. and Heyl, A. V. Jr. (1960) Chromite and other mineral deposits in serpentine rocks of the Piedmont Upland of Maryland, Delaware, and Pennsylvania, U. S. Geological Survey Bulletin 1082-K, p. 772 and Pl;ate 41.