title: Comparative study of biological potencies of different tuberculins.
mesh_terms: D000818:Animals; D001500:BCG Vaccine / Q000276:immunology; D006168:Guinea Pigs; D009163:Mycobacterium bovis / Q000276:immunology; D009169:Mycobacterium tuberculosis / Q000276:immunology; D011786:Quality Control; D014373:Tuberculin / Q000592:standards*; D014944:World Health Organization
chemical_list: D001500:BCG Vaccine; D014373:Tuberculin