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Please read BHL's Acknowledgment of Harmful Content
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  1. By: Conn, H. W. (Herbert William), - Conn, H. J. (Harold Joel), - Conn, H. W. (Herbert William),
    Edition: 3d ed., rev. by Harold Joel Conn ... with 63 illustrations.
    Publication info: Philadelphia, P. Blakiston's Son & Co, [c1918]
    Holding Institution: Cornell University Library
  2. By: Conn, H. J. (Harold Joel), - Ambler, Joseph Alfred, - Kornhauser, S. I. (Sidney Isaac), - Mallory, Frank Burr, - Sharp, Lester W. (Lester Whyland),
    Publication info: Geneva, N. Y, The Commission, 1925
    Holding Institution: MBLWHOI Library
  3. By: Conn, H. J. (Harold Joel),
    Edition: 6th ed., rev. with the assistance of Elmer H. Stotz and Mary A. Darrow.
    Publication info: Geneva, N.Y, Biotech Publications, 1953
    Holding Institution: MBLWHOI Library