title: The properties of non-virus-producing (NP) Rous sarcoma cells.
mesh_terms: D000818:Animals; D001358:Avian Sarcoma Viruses / Q000276:immunology*; D002642:Chick Embryo; D005321:Extraembryonic Membranes; D001357:Sarcoma, Avian / Q000276:immunology*; D014181:Transplantation Immunology