title: Heterogeneity of chick embryo cells with regard to Newcastle disease virus multiplication.
mesh_terms: D000818:Animals; D002478:Cells, Cultured; D002642:Chick Embryo; D066298:In Vitro Techniques; D009522:Newcastle disease virus / Q000254:growth & development*; D010948:Viral Plaque Assay; D014779:Virus Replication