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  1. Initiative in evolution,
    By: Kidd, Walter Aubrey,
    Publication info: London,H.F. & G. Witherby,1920.
    Contributed by: Smithsonian Libraries
    BHL Collections: Smithsonian Libraries
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  2. Initiative in evolution.
    By: Kidd, Walter Aubrey,
    Publication info: LondonH.F. & G. Witherby1920
    Contributed by: Gerstein - University of Toronto (archive.org)
    View Book