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  1. By: Cowdry, Nathaniel Harrington,
    Type: Article
    In: The Biological bulletin
    Volume: 33
    Date: 1917-09-01
    Page Range: 196--228
    Publication Info: Woods Hole, Mass Marine Biological Laboratory
  2. By: Cowdry, Nathaniel Harrington,
    Type: Article
    In: Journal of the North-China Branch of the Royal Asiatic Society for the year
    Volume: 53
    Date: 1922
    Page Range: 158-188
    Publication Info: Shanghai, Kelley & Walsh, 1906-1948