References
TOOMBS, R.B., A SURVEY OF THE MINERAL INDUSTRY OF SOUTHAFRICA, MINERAL INFORMATION BULLETIN MR 58, MINERALRESOURCES DIVISION, DEPARTMENT OF MINES, OTTAWA, 1962.WORLD MINING, WITWATERSRAND GOLD, MAY 1977, P. 50-53.WORLD MINING REGISTER 76-77, MILLER FREEMAN PUBLICATIONS,INC., 1977.MINTER, W.E.L., DETRITAL GOLD, URANIUM, AND PYRITE CON-CENTRATIONS RELATED TO SEDIMENT GEOLOGY IN THE PRECAMBRI-AN VAAL REEF PLACER, WITWATERSRAND, SOUTH AFRICA, ECONO-MIC GEOLOGY, V. 71, NO. 1, 1977, P. 157-176.ENGINEERING AND MINING JOURNAL INTERNATIONAL DIRECTORY OFMINING AND MINERAL PROCESSING OPERATIONS, MC GRAW HILL,NEW YORK, 1976.SOUTH AFRICA, GEOLOGICAL SURVEY SPECIAL PUBLICATION NO. 18,1972.MINING ANNUAL REVIEW, MINING JOURNAL, LONDON, 1977, P. 431-443.COETZEE, C.B., MINERAL RESOURCES OF SOUTH AFRICA, GEOLOGICALSURVEY PUBLICATION, HANDBOOK 7, FIFTH EDITION, 1976,P. 39-74, 233-240.MINING JOURNAL, QUARTER ENDING, JUNE 1977.THE MINERAL RESOURCES OF THE UNION OF SOUTH AFRICA, GEOLOGI-CAL SURVEY PUBLICATION, 1959, FOURTH EDITION.WATERMEYER, G.A. AND HOFFENBERG, S.N., WITWATERSRAND MININGPRACTICE, THE TRANSVAAL CHAMBER OF MINES, GOLD PRODUCERSCOMMITTEE, 1932.WESTERN DEEP LEVELS LTD. ANNUAL REPORTS,1974,1975,1976,1981.MINING WEEKLY, P. 6 (JUNE 25, 1993).MINING JOURNAL SUPPLEMENT. NOV.3, 1978.AME MINERAL ECONOMICS QUARTERLY MINE ANALYSIS, JUN 93,P. 32.