title: [Current problems of preventive vaccination in birds].
authors: J
authors: J
authors: Kösters
authors: J R
authors: JR
authors: Jakoby
mesh_terms: D000818:Animals; D001715:Bird Diseases / Q000517:prevention & control*; D001717:Birds; D014611:Vaccination / Q000662:veterinary*
vernacular_title: Aktuelle Probleme von Schutzimpfungen bei Vögeln.