title: Origin of group-specific antigen of chicken leukosis viruses.
mesh_terms: D000818:Animals; D000906:Antibodies; D000941:Antigens; D001354:Avian Leukosis Virus; D002642:Chick Embryo; D003168:Complement Fixation Tests; D006224:Cricetinae; D046508:Culture Techniques; D005347:Fibroblasts; D011200:Poultry; D011817:Rabbits
chemical_list: D000906:Antibodies; D000941:Antigens