title: [Contribution to the epidemiology of parainfluenza II virus in chickens].
mesh_terms: D000818:Animals; D004813:Epidemiology; D009976:Orthomyxoviridae Infections / Q000662:veterinary*; D011201:Poultry Diseases
vernacular_title: Zur Epidemilogie des Parainfluenza-II- Virus der Hühner.