1. A minimum age for the Premier kimberlite pipe yielded by biotite Rb-Sr measurements, with related galena isotopic data;Allsopp;Earth. Planet. Sci. Letts.,1967
2. Rubidiumstrontium age determinations on South African kimberlite pipes;Barrett,1973
3. A pyroxene geotherm;Boyd;Geochimica et Cosmochimica Acta,1973
4. Mineral analyses for Lesotho kimberlites, Ed's note;Boyd,1973
5. Ultramafic xenoliths from the Frank Smith Mine and the Kimberley area;Boyd,1975