GRUNWALD ROSS R GEOLOGY AND MINERAL DEPOSITS OF THE GALENA MISTRICT BLACK HILLS SOUTH DAKOTA PH D THESIS SOUTH DAKOTA SCMINES AND TECHNOLOGY 1970 285 PPSHAPIRO L H AND GRIES J P ORE DEPOSITS IN ROCKS OF PALEOZOICRTIARY AGE OF THE NORTHERN BLACK HILLS SOUTH DAKOTA 1970 110CONNOLLY, J P THE TERTIARY MINERALIZATION OF THE NORTHERN BLLS SOUTH DAKOTA SCHOOL OF MINES BULL 15,1927,P 99CONALLY J P AND O'HARRA, CC THE MINERAL WEALTH OF THE BLACKSOUTH DAKOTA SCHOOL OF MINES BULL 16 1929 P 190IRVING, J D. ET AL ECONOMIC RESOURCES OF THE NORTHERN BLACKGEOL SURVEY PROF PAPER 26 1902 PP170-171.U S BUREAU OF MINES, STAFF REGIONV BLACK HILLS MINERAL ATLASDAKOTA: PART I BUMINES IC 7688 P 33