| Reference | {Deposit:: U. S. GEOLOGICAL SURVEY, U. S. BUREAU OF RECLAMATION, SOUTH DAKOTA GEOLOGICAL SURVEY, 1975 , MINERAL AND WATER RESOURCES OF SOUTH DAKOTA, SOUTH DAKOTA GEOLOGICAL SURVEY BULLETIN 16}{Deposit:: ROBERTS, W. L., AND RAPP, GEORGE, 1965 , MINERALOGY OF THE BLACK HILLS, SOUTH DAKOTA SCHOOL OF MINES AND TECHNOLOGY BULLETIN 18}{Deposit:: US BUREAU OF MINES, 1954 , BLACK HILLS MINERAL ATLAS, SOUTH DAKOTA: PART I, BUREAU OF MINES INFORMATION CIRCULAR 7688 .} |