title: [The production of an enhancing factor].
mesh_terms: D000818:Animals; D000914:Antibodies, Viral; D000917:Antibody Formation; D002645:Chickens; D005321:Extraembryonic Membranes / Q000276:immunology*; D000882:Haplorhini; D006386:Hemagglutination Tests; D006564:Herpesviridae / Q000276:immunology; D007668:Kidney / Q000276:immunology; D010222:Parainfluenza Virus 1, Human / Q000276:immunology; D011817:Rabbits; D014616:Vaccinia virus / Q000276:immunology
chemical_list: D000914:Antibodies, Viral
vernacular_title: Studio sulla produzione del fattore enhancer.