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A SURVEY OF THE MINERAL INDUSTRY OF SOUTH AFRICA,BY R.B.TOOMRAL INFORMATION BULLETIN MR 58,1962,MINER.RES.DIV,DEPT.MINESWITWATERSRAND GOLD,WORLD MINING, MAY,1977,P.50-53.WORLD MINES REGISTER 76-77,MILLER FREEMAN PUB,INC.DETRITAL GOLD,URANIUM,AND PYRITE CONCENTRATIONS RELATED TO SOLOGY IN THE PRECAMBRIAN VAAL REEF PLACER,WITWATERSRAND,SOUTA;W.E.L.MINTER,ECON-GEOL,V-71,#1,1977,P.157-176E/MJ INTERNATIONAL DIRECTORY OF MINING AND MINERAL PROCESSINTIONS,PUB.BY ENG.AND MIN.JOURN,MCGRAW HILL,N.Y,1976GEOL.SURV,SP.PUBL.18,1972,S.AFRICAMINING ANNUAL REVIEW,PUB.MIN.JOURN,LONDON,1977,P.431-443MINERAL RESOURCES OF SOUTH AFRICA,GEOL.SURV.PUB,EDT,BY C.B.CHAND BOOK 7,1976,FIFTH EDITION,P.39-74,233-240.MINING JOURNAL,QUARTER ENDING,JUNE,1977THE MINERAL RESOURCES OF THE UNION OF SOUTH AFRICA,GEOL.SUR.9,4TH EDITION.WITWATERSRAND MINING PRACTICE,BY WATERMEYER,G.A.AND HOFFENBEPUB.BY THE TRANSVAAL CHAMBER OF MINES,GOLD PRODUCERS COMMITTVENTERSPOST GOLD MINING CO,LTD,ANNUAL REPORTS,1975,1976.AME MINERAL ECONOMICS QUARTERLY MINE ANALYSIS, JUN 93,P. 32.