title: A survey of genetic resistance to leukosis-sarcoma viruses in commercial stocks of chickens.
mesh_terms: D000818:Animals; D001353:Avian Leukosis / Q000235:genetics*; D001354:Avian Leukosis Virus / Q000145:classification / Q000472:pathogenicity*; D001947:Breeding; D002642:Chick Embryo; D002645:Chickens