Pomfret

OPERATIONAL NAVIGATION CHART.Q-4.SCALE 1:1,000,000.DREYER,C.J.B.,ROBINSON,H.A.THE OCCURENCE AND EXPLOITATION OFAMPHIBOLE ASBESTOS IN SOUTH AFRICA.PRESENTED AT 1978 AIMEANNUAL MEETING.FEB.28-MARCH 2,1978.PREPRINT #78-H-64.PP.7,18.MANOS,A.INDUSTRIAL MINERALS OF SOUTH AFRICA.REPRINT FROMNOV.1977 ISSUE OF INDUSTRIAL MINERALS.METAL BULL.LTD.SURREY,ENGLAND.30PP.E/MJ.1978 INTL.DIRECT.OF MINING AND MINERAL PROCESSINGOPERATIONS.MCGRAW HILL.N.Y.P.337.MINING MAGAZINE.MINING ACTIVITY IN THE WESTERN WORLD.MARCH1978.P.235.MINERALS BUREAU,S.A.DEPT.OF MINES.MINERALS MARKETING INFORM-ATION,NON-METALLIC MINES IN S.AFRICA.PRELIM.REPORT NO.10.BRAAMFONTEIN.P.20.