1. A minimum age for the Premier kimberlite pipe yielded by biotite RbSr measurements, with related galena isotopic data;Allsopp;Earth Planet. Sci. lett.,1967
2. The effect of climate and facies environment on the fractionation of the rare-earth elements during sedimentation;Balashov;Geochemistry Internat.,1964
3. Rubidium-strontium age determinations of South African kimberlite pipes;Barrett,1973
4. Precious Stones;Bauer,1904
5. Source mantle, residium and partial melt composition deduced from the kimberlite record;Berg,1973