| Reference | {Deposit:: CONNOLLY,J.P & *ARRA,C.C. THE MIN. WEALTH OF THE B.H. S.D.}{Deposit:: OF MINES BULL.16,1929,P251.}{Deposit:: LINCOLN,F.C.BERYL IN THE B.H. ENG. & MIN.JOUR.,VOL.135,1934,}{Deposit:: 203.}{Deposit:: LINCOLN,F.C.ET ALL. THE MINING INDUSTRY OF S.D. S.D.SCHOOL O}{Deposit:: BULL.17,1937,P.69.}{Deposit:: STERRETT,D.B. MICA DEP.OF S.D. GEOL.SURVEY BULL.380,1909,P.3}{Deposit:: U.S.BU.MINES STAFF,REGION V. B.H.MIN.ATLAS,S.D:PART 2,IC 770}{Deposit:: P.116.} |