title: Characteristics of two strains of avian sarcoma virus B77.
mesh_terms: D001355:Alpharetrovirus / Q000145:classification* / Q000254:growth & development / Q000276:immunology / Q000472:pathogenicity; D000818:Animals; D000941:Antigens; D002642:Chick Embryo; D007106:Immune Sera; D014762:Viral Interference; D014776:Virus Cultivation
chemical_list: D000941:Antigens; D007106:Immune Sera