title: Spontaneous segregation of nontransforming viruses from cloned sarcoma viruses.
mesh_terms: D000818:Animals; D001358:Avian Sarcoma Viruses / Q000254:growth & development / Q000276:immunology / Q000302:isolation & purification*; D002471:Cell Transformation, Neoplastic; D002642:Chick Embryo; D002999:Clone Cells; D046508:Culture Techniques; D005347:Fibroblasts; D005827:Genetics, Microbial; D008722:Methods; D012526:Satellite Viruses / Q000254:growth & development / Q000302:isolation & purification / Q000472:pathogenicity; D014762:Viral Interference; D014776:Virus Cultivation