| Reference | {Deposit:: PEARRE,N.C AND HEYL AV COPPER ZINC LEAD IRON COBALT AND BARI}{Deposit:: SITS IN THE PIEDMONT UPLAND OF MARYLAND,MARYLAND GEOL SUR BU}{Deposit:: 1965.}{Deposit:: PEARRE,NC 1961 MINERAL DEPOSITS OF MARYLAND,EXCLUDING FUEL,S}{Deposit:: GRAVEL,MARYLAND GEOLOGICAL SURVEY,MINERAL INVESTIGATIONS RES}{Deposit:: MAP MR 12.} |