1. Solution hardening
2. Substitutional solution hardening
3. N.P.L. Sympos;Fleischer,1963
4. and , Rep. Conf. The Strength of Solids, 1947, Phys. Soc., London 1948 (p. 1).
5. Dislocations and Plastic Flow in Crystals, Oxford University Press, Oxford 1953.