| Reference | {Deposit:: PEARRE, N L & HEYL, A V, 1960, USGS BULL 1082-K, P. 804.}{Deposit:: DEPOSITS IN SERPENTINE ROCKS OF THE PIEDMONT UPLAND,MD.PA.AN}{Deposit:: U.S.GEOL.SURVEY BULL.1082-K,PG.804AND PLATE 40.}{Deposit:: PEARRE, NANCY C, 1961, USGS MIN INV RES MAP MR-12.} |