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  1. Field book of western wild flowers /
    By: Armstrong, Margaret, - Thornber, John James,
    Publication info: New York :Putnam,1915.
    Contributed by: Mertz Library, The New York Botanical Garden
    BHL Collections: New York Botanical Garden
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  2. Field book of western wild flowers, by Margaret Armstrong in collaboration with J.J. Thornber ... with five hundred illustrations in black and white, and forty-eight plates in color drawn from nature by the author.
    By: Armstrong, Margaret, - Thornber, J. J.
    Publication info: London,C. [sic] P. Putnam's Sons,1915.
    Contributed by: University of California Libraries (archive.org)
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