title: The direct method of diagnosis of duodenal ulcer by means of the roentgen ray.
authors.forename: A W
authors.initials: AW
authors.lastname: George
authors.forename: I
authors.initials: I
authors.lastname: Gerber
mesh_terms: D004381:Duodenal Ulcer / Q000000981:diagnostic imaging / Q000266:history*; D049673:History, 20th Century; D006801:Humans; D011859:Radiography