RECENT EXPERIENCES OF COTINUOUS CASTING AT HIGHVELD STEEL ANIUM CORP LTD IN JOUR OF THE S.AFRICAN INST OF MIN MET JUNE 1A PROCESS FOR THE PRODUCTION OF HIGH GRADE VANADIUM PENTOXIDSOLUTIONS CONTAINING CHROMIUM ANDSILICA IN JOUR OF THE S.AFRST.OF MIN AND MET APRIL 1968THE RECOVERY OF VANADIUM PENTOXIDE AT THE TRANSVAAL VANADIUMN JOUR OF THE S.AFRICAN INST OF MIN AND MET APRIL 1968 P39MINING ANN REV 1973 P17 AND 295MINING ANN REV 1974 P89MINING ANN REV 1971 P71DE KUN THE MINERAL RESOURCES OF AFRICA P196