title: Determination of aspirin, phenacetin, caffeine, and thenylene hydrochloride.
authors.forename: W H
authors.initials: WH
authors.lastname: WASHBURN
authors.forename: E O
authors.initials: EO
authors.lastname: KRUEGER
mesh_terms: D001241:Aspirin; D002110:Caffeine; D006633:Histamine Antagonists; D010615:Phenacetin
chemical_list: D006633:Histamine Antagonists; D002110:Caffeine; D010615:Phenacetin; D001241:Aspirin