title: [Pathogenicity tests of 7 field strains of Newcastle disease virus isolated between 1962 and 1968].
mesh_terms: D000818:Animals; D001681:Biological Assay; D002642:Chick Embryo; D002645:Chickens; D005260:Female; D005859:Germany, East; D007275:Injections, Intravenous; D009521:Newcastle Disease / Q000453:epidemiology*; D009522:Newcastle disease virus / Q000302:isolation & purification / Q000472:pathogenicity*; D011201:Poultry Diseases / Q000453:epidemiology*; D013997:Time Factors
vernacular_title: Pathogenitätsprüfungen an 7 Newcastle-Disease-Feldvirusstämmen aus den Jahren 1962 bis 1968.