title: Observations on the decline in immunosuppressive potency of rabbit anti-mouse thymocyte sera raised by repeated immunization of the same rabbit.
mesh_terms: D000372:Agglutination Tests; D000818:Animals; D000917:Antibody Formation; D000941:Antigens; D000961:Antilymphocyte Serum; D007114:Immunization; D005779:Immunodiffusion; D051379:Mice; D011817:Rabbits; D013950:Thymus Gland / Q000166:cytology*
chemical_list: D000941:Antigens; D000961:Antilymphocyte Serum