The great hookworm crusade.
D000047:Academies and Institutes / Q000266:history*; D005582:Foundations / Q000266:history*; D049711:History, Modern 1601-; D006725:Hookworm Infections / Q000266:history*; D012423:Rural Health / Q000266:history*; D012952:Societies / Q000266:history*; D014481:United States