DEVELOPMENTS IN BIOLOGICAL STANDARIZATION vol.39 530,714 International Symposium on Influenza Immunization. Proceedings of the 53rd Symposium organized by the International Association of Biological Standardization and held at the WHO Auditorium, Geneva, Switzerland 1-3 Julie 1977. Acting ed. F. T. Perkins and R. H. Regamey. Basel 1977 S. Karger 8° a. XIV, 530. il. International Association of Microbiological Societies Developments in Biological Standardization