title: [Steps in the primary immune response in vivo. I. The repeated requirement for antigen (author's transl)].
mesh_terms: D000818:Animals; D000906:Antibodies / Q000032:analysis*; D000917:Antibody Formation; D000921:Antibody-Producing Cells / Q000276:immunology*; D000941:Antigens / Q000008:administration & dosage*; D004912:Erythrocytes / Q000276:immunology; D006462:Hemolytic Plaque Technique; D008297:Male; D051379:Mice; D012756:Sheep / Q000276:immunology; D013154:Spleen / Q000166:cytology
chemical_list: D000906:Antibodies; D000941:Antigens
vernacular_title: Untersuchungen über den Mechanismus der primären Immunantwort. I. Zweimaliger Eingriff von Antigen in den Ablauf der primären Immunreaktion.