title: WHO Expert Committee on Biological Standardization. Nineteenth report.
mesh_terms: D000900:Anti-Bacterial Agents; D000906:Antibodies; D000941:Antigens; D001681:Biological Assay; D004798:Enzymes; D006728:Hormones; D006801:Humans; D007202:Indicators and Reagents
chemical_list: D000900:Anti-Bacterial Agents; D000906:Antibodies; D000941:Antigens; D004798:Enzymes; D006728:Hormones; D007202:Indicators and Reagents