1. and 1965 ‘Correlations between hailstone structures and growth conditions,’ Proc. Inter. Conf. Cloud Phys., Tokyo and Sapporo, Japan, May 24-June 1, p. 281.
2. The lobe structure of giant hailstones
3. Air Bubbles in Ice
4. 1964 ‘Hailstorms in Johannesburg, Pretoria and surroundings,’ C.S.I.R. Res. Rep. 288, Pretoria, South Africa.
5. Transvaal hailstones