Mutation frequency of red and clear plaque types of the Hickman strain of Newcastle disease virus.
D000818:Animals; D002460:Cell Line; D002642:Chick Embryo; D002645:Chickens; D002999:Clone Cells; D005347:Fibroblasts; D008722:Methods; D009154:Mutation; D009522:Newcastle disease virus / Q000145:classification; D014776:Virus Cultivation