Immunization, benefit versus risk factors : proceedings of the 36th symposium / organized by the International Association of Biological Standardization and held at the College of Medicine, Université Catholique de Louvain, Woluwe St. Lambert, Belgium, 15-17 November 1978 ; acting editors, W. Hennessen and C. Huygelen. (Developments in biological standardization ; v. 43)
Immunization, benefit versus risk factors : proceedings of the 36th symposium / organized by the International Association of Biological Standardization and held at the College of Medicine, Université Catholique de Louvain, Woluwe St. Lambert, Belgium, 15-17 November 1978 ; acting editors, W. Hennessen and C. Huygelen.
(Developments in biological standardization ; v. 43)