title: David Harker: October 19, 1906-February 27, 1991.
authors.forename: H A
authors.initials: HA
authors.lastname: Hauptman
mesh_terms: D018360:Crystallography, X-Ray / Q000266:history*; D049673:History, 20th Century; D006801:Humans; D009369:Neoplasms / Q000266:history*; D012952:Societies / Q000266:history; D014481:United States