title: Preliminary observation on the modification of a strain of Newcastle disease virus by intracerebral passage through ducklings.
authors.forename: A
authors.initials: A
authors.lastname: KOMAROV
authors.forename: L
authors.initials: L
authors.lastname: GOLDSMIT
mesh_terms: D000818:Animals; D004372:Ducks; D009521:Newcastle Disease; D009522:Newcastle disease virus