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2. Bennett, J. D. (in press): The tectono-metamorphic complex of eastern Botswana. Rep. Geol. Surv. Botswana.
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4. The Selebi-Pikwe nickel-copper deposits, Botswana;Gordon,1973
5. Chromian spinel as a petrogenetic indicator, pt. 2. Petrologic applications;Irvine;Can. J. Earth Sci.,1967