G. Proceedings of the 37th symposium organised by the International Association of Biological Standardization and held at the Rijks Instituut voor de Volksgezondheid, Bilthoven, The Netherlands, 11-13 October 1972 / 
editors, R. H. Regamey and H. Cohen. 
 - Basel :  S. Karger,  1973. 
 - 365 p. :  ill. ;  25 cm. 
 - Symposia series in immunobiological standardization ;  v.19 .
 - Symposia series in immunobiological standardization ;  v.19. .
<br/><br/><label>Subjects--Topical Terms: </label><br/>Smallpox vaccine--Congresses.