1. Rb-Sr age measurements on total rock and separated mineral fractions from the old granite of the Central Transvaal;ALLSOPP;J. Geophys. Res.,1961
2. The pseudotachylite of the Vredefort dome;BISSCHOFF;Geol. Soc. South Africa Trans.,1962
3. Discussion on shatter cones in the rocks of the Vredefort ring. (R. B. Hargraves;BRINK;Geol. Soc. South Africa Trans.,1961
4. Exploration of the Witwatersrand System and its extensions;BORCHERS;Geol. Soc. South Africa Proc.,1961
5. Cryptovolcanic structures in the United States;BUCHER;Rept. 16th Intern. Geol. Congr.,1933