Reference | {Deposit:: U.S.BUREAU OF MINES INTERNAL MEMO,AREA I MINERAL RESOURCES O}{Deposit:: PITTSBURGH,PA,DEC 1964.}{Deposit:: PEARRE, NANCY C, 1956, USGS MIN INV. RES. MAP MR-4}{Deposit:: NOT ON 1980 OR 1981 MSHA LISTS}{Deposit:: NOT ON RCF OR CMS LISTS 10/81} |