title: Obituary: Dick van der Helm, an internationally recognized siderophore researcher and a crystallographer.
authors.affiliation: University of Calgary, Calgary, Canada. vogel@ucalgary.ca
authors.forename: Hans J
authors.initials: HJ
authors.lastname: Vogel
mesh_terms: D003461:Crystallography / Q000266:history*; D004500:Education, Graduate; D049673:History, 20th Century; D049674:History, 21st Century; D006801:Humans; D017262:Siderophores / Q000266:history; D014481:United States
chemical_list: D017262:Siderophores