Porto Rico: report on the high mortality on the island. 1900.
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D003140:Communicable Disease Control / Q000266:history*; D004813:Epidemiology / Q000266:history*; D049673:History, 20th Century; D006725:Hookworm Infections / Q000266:history / Q000401:mortality / Q000517:prevention & control; D006801:Humans; D011647:Puerto Rico