1. Wolstenholme, G. E. W., and O'Connor, S. M., (edit.), “Drug Resistance in Micro-organisms”, Ciba Found. Symposium (Churchill, London, 1957).
2. Symposium on Metabolism of Insecticides, Canad. J. Biochem. Physiol., 37, 1089 (1959).
3. Davis, B. D., “Drug Resistance in Micro-organisms”, Ciba Found. Symposium, edit. by Wolstenholme, G. E. W., and O'Connor, S. M. (Churchill, London, 1957).
4. Pollock, M. R., “Adaptation in Micro-organisms”, Third Symp. Soc. Gen. Microbiol. (Cambridge, 1953).
5. Gale, E. F., and Rodwell, A. W., J. Gen. Microbiol., 3, 127 (1949).