1. Garnham, P. C. C., Malaria Parasites and other Haemosporidia (Blackwell, Oxford, 1966).
2. Hammond, D. M., in Ecology and physiology of Parasites, (Adam Hilger Ltd, London, 1971).
3. Vetterling, J. M., Madden, P. A., and Dittemore, N. S., Z. Parasitenk., 37, 136 (1971).
4. Roberts, W. L., Speer, C. A., and Hammond, D. M., J. Parasit., 56, 918 (1970).