title: Genetically stable reassortment of markers during mixed infection with avian tumor viruses.
mesh_terms: D000818:Animals; D001358:Avian Sarcoma Viruses / Q000254:growth & development / Q000302:isolation & purification / Q000472:pathogenicity*; D002471:Cell Transformation, Neoplastic; D002642:Chick Embryo; D046508:Culture Techniques; D005347:Fibroblasts; D005827:Genetics, Microbial; D010641:Phenotype; D011995:Recombination, Genetic; D012526:Satellite Viruses / Q000254:growth & development / Q000302:isolation & purification / Q000472:pathogenicity; D014776:Virus Cultivation