1. A. F. Williams, ?The Genesis of the Diamond?, Vol. II (Ernest Benn Limited, London, 1932) pp. 481?511 (Review of early work, especially Fersmann and Goldschmidt plus Williams' own observations).
2. S. Tolansky, ?The Microstructure of Diamond Surfaces? (N.A.G. Press Ltd., London, 1954).
3. Idem, in ?Physical Properties of Diamond?, edited by R. Berman (Clarendon Press, Oxford, 1965) pp. 135?73.
4. F. C. Frank andA. R. Lang, in ?Physical Properties of Diamond?, edited by R. Berman (Clarendon Press, Oxford, 1965) pp. 69?115.
5. M. Seal,Amer. Min. 50 (1965) 105.