Reference | {Deposit:: PEARRE, N C & HEYL, A V, 1960, USGS BULL 1082-K, PP 796-797.}{Deposit:: DEPOSITS IN SERPENTINE ROCKS OF THE PIEDMONT UPLANDS,MD.,PA.}{Deposit:: DEL.U.S.GEOL.SURVEY-BULL.1082-K,PG.796-797 AND PLATE 40.}{Deposit:: PEARRE, NANCY C, 1961, USGS MIN INV RES MAP MR-12.} |