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  1. The human side of animals,
    By: Dixon, Royal,
    Publication info: New York,Frederick A. Stokes Company[c1918]
    Contributed by: Library of Congress
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  2. The human side of birds / by Royal Dixon.
    By: Dixon, Royal,
    Publication info: New York :Halcyon House,1917.
    Contributed by: Gerstein - University of Toronto (archive.org)
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  3. The human side of birds,
    By: Dixon, Royal,
    Publication info: New York,Halcyon House[c1917]
    Contributed by: Cornell University Library
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  4. The human side of birds,
    By: Dixon, Royal,
    Publication info: New York,Frederick A. Stokes company[c1917]
    Contributed by: Cornell University Library
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  5. The human side of birds, by Royal Dixon; with four illustrations in colours by S. H. Wainwright, jr., and with thirty-two illustrations from photographs.
    By: Dixon, Royal,
    Publication info: New York :Frederick A. Stokes company,[c1917]
    Contributed by: University of California Libraries (archive.org)
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  6. The human side of birds, by Royal Dixon; with four illustrations in colours by S. H. Wainwright, jr., and with thirty-two illustrations from photographs.
    By: Dixon, Royal,
    Publication info: New York,Frederick A. Stokes company[c1917]
    Contributed by: American Museum of Natural History Library
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  7. The human side of plants,
    By: Dixon, Royal,
    Publication info: London.G. Richards, Ltd.,[c1914]
    Contributed by: Cornell University Library
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  8. The human side of plants,
    By: Dixon, Royal,
    Publication info: New York :Frederick A. Stokes company,[c1914]
    Contributed by: University of California Libraries (archive.org)
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  9. The human side of plants, by Royal Dixon, with four illustrations in colors and thirty-two in black-and-white.
    By: Dixon, Royal,
    Publication info: New York :Frederick A. Stokes company,[c1914]
    Contributed by: University of California Libraries (archive.org)
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  10. The human side of trees, wonders of the tree world, by Royal Dixon and Franklyn Everett Fitch, with four illustrations in colors and thirty-two in black-and-white.
    By: Dixon, Royal, - Fitch, Franklyn Everett.
    Publication info: New York :Frederick A. Stokes company,[c1917]
    Contributed by: University of California Libraries (archive.org)
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  11. Personality of plants, by Royal Dixon and Franklyn E. Fitch.
    By: Dixon, Royal,
    Publication info: New York,Boullion-Biggs,1923.
    Contributed by: Mertz Library, The New York Botanical Garden
    BHL Collections: New York Botanical Garden
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