title: Etiological strain specificities of the avian tumor viruses.
mesh_terms: D000818:Animals; D001353:Avian Leukosis / Q000382:microbiology; D001354:Avian Leukosis Virus / Q000145:classification*; D001715:Bird Diseases / Q000382:microbiology; D002645:Chickens; D008223:Lymphoma / Q000382:microbiology; D011201:Poultry Diseases / Q000382:microbiology; D012509:Sarcoma / Q000662:veterinary; D013045:Species Specificity