536,851 SYMPOSIUM Symposium on Ho st-parasite Interactions. Umea, Sweden, June 6-8, 1979. Ed. by Stig E. Holm. Co-eds.: Bengt Björksten, Leif Gothefors, Merle Sande. Uppsala 1980 Almqvist and Wiksell 8 s. 227, il. Scandinavian Journal of Infectious Diseases suppl. 24