Zircon ion microprobe studies bearing on the age and evolution of the Witwatersrand triad von Armstrong, R.A., Compston, W., Retief, E.A., Williams, I.S., Welke, H.J.

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Composition, age and tectonic setting of amphibolites in the central Bushmanland Group, Western Namaqua Province, southern Africa von Reid, David L, Welke, H.J, Erlank, A.J, Betton, P.J

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Feasibility of total-rock PbPb dating of metamorphosed banded iron formation; The Marydale Group, southern Africa von Barton, E.S, Armstrong, R.A, Cornell, D.H, Welke, H.J

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Lead isotopic studies of some Late Proterozoic stratabound ores of central Africa von Hughes, M.J., Welke, H.J., Allsopp, H.L.

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Comparison of three techniques for the determination of uranium and thorium in rocks von Hart, R.J., Reid, D.L., Stuckless, J.S., Welke, H.J.

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Measurements of K, Rb, U, Sr and Pb in diamonds containing inclusions von WELKE, H. J, ALLSOPP, H. L, HARRIS, J. W

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