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Please read BHL's Acknowledgment of Harmful Content
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  1. By: Ritter, William E. - Scripps Institution for Biological Research.
    Publication info: [San Diego, Calif.?], The Institution, 1918
    Holding Institution: Columbia University Libraries
  2. By: Ritter, William E. - Scripps Institution for Biological Research.
    Publication info: [San Diego, Calif.?], The Institution, 1919
    Holding Institution: Columbia University Libraries