1. Developments in Malaria Immunology, Tech. Rep. Ser. Wld Hlth Org. 579 (1975).
2. Beaudoin, R. L. Bull. Wld Hlth Org. 55, 373–376 (1977).
3. Vanderberg, J. J., Weiss, M. M. & Mack, S. R. Bull. Wld Hlth Org. 55, 377–392 (1977).
4. Trager, W. & Jensen, J. B. Science 193, 673–675 (1976).
5. Jensen, J. B. & Trager, W. J. Parasit. 63, 883–886 (1977).