References
AGUIRRE, C.A., PALABORA MINE, PALABORA MINING CO., LTD.,TRANSVAAL, SOUTH AFRICA, AUGUST, 1980 ( UNPUBLISHED)BARCLAYS BANK LTD., LETTER DATED 3/26/81BUREAU OF MINES, LETTER DATED 4/14/80 FROM COMMODITY SPECIALPHOSPHATE ROCK TO CHIEF, BRANCH OF DOMESTIC DATA.DIXON, ATLAS OF WORLD MINING - SOUTH AFRICA, 1979.HANEKOM, H.J., VAN STADEN, C.M.V.H., SMIT, P.J. AND PIKE, D.THE GEOLOGY OF THE PALABORA IGNEOUS COMPLEX: SOUTHAFRICA DEPT. OF MINES, GEOLOGICAL SURVEY, MEMOIR 54,PRETORIA, 1965.HEINRICH, E. WM., THE PALABORA CARBONATITIC COMPLEX-- AUNIQUE COPPER DEPOSIT: CANADIAN MINERALOGIST, VOL. 19,PART 7, 1970, P. 585-598.JAGER, D.H. DE AND FOURIE, P.J., A REVIEW OF SOME NEW AS-PECTS ON PHOSPHATE MINERALIZATION IN THE PALABORA IGNE-OUS COMPLEX SOUTH AFRICA: AIME, DENVER, FEB.-MAR.,1978.MINING ANNUAL REVIEW - 1980, P. 496.PALABORA MINING CO., LTD., PALABORA, SOUTH AFRICA, JULY 1977NEL, VIC, PALABORA'S NEW HEAVY MINERALS PLANTS ADDS URANIUMCONCENTRATE TO THE RECOVERY LIST: E & M.J., NOV. 1972PHOSPHATE DEVELOPMENT CORP., LTD. ANNUAL REPORT, 1980PHOSPHATE DEVELOPMENT CORP., LTD., FOSKOR, N.D., 24 P.PHOSPHATE DEVELOPMENT CORP., COETZEE, C.B. AND VISSER, H.N.MEHLISS, A.T.M., PHOSPHATES: MINERAL RESOURCES OF THEREPUBLIC OF SOUTH AFRICA, 5TH EDITION, HANDBOOK 7,1976, 8 PP.ROUX, E.H., THE SOUTH AFRICAN PHOSPHATE ROCK INDUSTRY,FERTILIZER SOCIETY OF SOUTH AFRICA JOURNAL,VOL. 2,1975.RUSSELL, B.G., THE POSSIBLE RECOVERY, DURING THE MANUFACTUREOF PHOSPHORIC ACID, OF RARE EARTHS FROM FOSKOR CONCEN-TRATE, BULLETIN NO. 1, MINERALS BUREAU, JOHANNESBURG,SOUTH AFRICA, 1977.WHAT IS BELIEVED TO BE THE WORLD'S LARGEST MOBILE CRUSHINGUNIT...: E. & M. J., MARCH 1980.INDUSTRIAL MINERALS, FEB. 1983, PP. 11-12.NORTHOLT, ARTHUR,"IGNEOUS PHOSPHATE RESOURCES...", PAPERPRESENTED AT THE INDUSTRIAL MINERALS CONFERENCE ONPHOSPHATES, FLORIDA, DEC, 1983.INDUSTRIAL MINERALS, JAN. 1984, PP. 57-58.MINING ANNUAL REVEIW, 1984.INDUSTRIAL MINERALS, JANUARY 1985, P. 12.E & MJ, JAN. 1985, P. 41.GREEN MARKETS, AUGUST 26, 1985, P. 5.MINING ANNUAL REVEIW, 1985, P. 413.SOUTH AFRICAN COAL, GOLD, AND BASE MINERALS, JAN. 1986, P.23DIRECTORY, MINERALS BUREAU OF SOUTH AFRICA, "NON-METALLICCOMMODITIES PRODUCED IN THE REPUBLIC OF SOUTH AFRICA",MAY 1986.MINING ANNUAL REVIEW, 1987, P. 390.MINING ANNUAL REVEIW, 1988, P. 370.INDUSTRIAL MINERALS, AUGUST 1989, P. 38.PHOSPHOROUS & POTASSIUM, NO. 169, SEPT/OCT. 1990, PP. 32-33.