PERSPECTIVES IN IMMUNOLOGY 536,977 NATURAL Natural resistance systems against foreign cells, tumors, and microbes. Proceedings of an International Conference held at Timber Cove Inn Jenner, California October 18-22, 1976. Ed. by Gustavo Cudkowicz, Mauria Landy, Gene M. Shearer. New York 1978 Academic Press 8° s. XI, nlb. 1, 229, il. Perspectives in Immunology