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2. Isotopic composition of strontium in carbonatites and kimberlites;Powell,1967
3. G.W. Berg. In preparation.
4. Potassium, rubidium and caesium in South African kimberlites and their peridotite xenoliths;Gurney;Geol. Soc. South Africa Spec. Pub.,1970
5. Matrix correction in trace element analysis by x-ray fluorescence: estimation of mass absorption coefficient by Compton scattering;Reynolds;Am. Mineralogist,1963