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  1. Illustrations of new species of exotic butterflies : selected chiefly from the collections of W. Wilson Saunders and William C. Hewitson / by William C. Hewitson.
    By: Hewitson, William C. - Saunders, W. Wilson - Hullmandel & Walton, - M. & N. Hanhart, - Walter & Cohn,
    Publication info: London :John Van Voorst,[1856]-1876.
    Contributed by: Smithsonian Libraries
    BHL Collections: Smithsonian Libraries
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  2. A monograph of the Trochilidæ, or family of humming-birds /
    By: Gould, John, - Richter, Henry Constantine, - Hullmandel & Walton, - Walter & Cohn,
    Publication info: London :Printed by Taylor and Francis ;1861 [i.e. 1849-1861]
    Contributed by: Smithsonian Libraries
    BHL Collections: Blog Features | Smithsonian Libraries
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