title: Avian leukosis-sarcoma viruses and antibody in field flocks, and their relationship to "leukosis" mortality.
mesh_terms: D001355:Alpharetrovirus; D000818:Animals; D000906:Antibodies; D001353:Avian Leukosis / Q000401:mortality*; D002645:Chickens; D009500:Neutralization Tests; D011201:Poultry Diseases / Q000276:immunology / Q000401:mortality*
chemical_list: D000906:Antibodies