title: Tuberculin studies; comparative potency determinations of tuberculin fractions obtained as a result of ultrafiltration and trichloracetic acid precipitation.
authors.forename: L M
authors.initials: LM
authors.lastname: HEATH
mesh_terms: D002980:Climate; D055633:Immune System Phenomena; D035846:Law Enforcement; D014238:Trichloroacetic Acid; D014373:Tuberculin; D014462:Ultrafiltration
chemical_list: D014373:Tuberculin; D014238:Trichloroacetic Acid
keywords: TUBERCULIN