title: The murine leukemia-sarcoma virus complex.
mesh_terms: D000818:Animals; D001353:Avian Leukosis; D001354:Avian Leukosis Virus / Q000032:analysis*; D002645:Chickens; D066298:In Vitro Techniques; D007938:Leukemia; D009052:Leukemia Virus, Murine / Q000032:analysis*; D051379:Mice