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  1. Elementary botany
    By: Groom, Percy, - Gray, Asa, - Penhallow, D. P.
    Publication info: Toronto :Copp, Clark,[1899?]
    Contributed by: Canadiana.org (archive.org)
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  2. Elementary botany /
    By: Groom, Percy,
    Publication info: London :G. Bell,1898.
    Contributed by: Cornell University Library
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  3. Oecology of plants; an introduction to the study of plant-communities, by Eug. Warming, assisted by Martin Vahl. Prepared for publication in English by Percy Groom and Isaac Bayley Balfour.
    By: Warming, Eugenius, - Balfour, Isaac Bayley, - Groom, Percy, - Vahl, M.
    Publication info: Oxford :Clarendon Press,1909.
    Contributed by: University of California Libraries (archive.org)
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  4. Plant-geography upon a physiological basis.
    By: Schimper, A. F. W. - Balfour, Isaac Bayley, - Fisher, William Rogers. - Groom, Percy,
    Edition: Rev. and ed.
    Publication info: Oxford :Clarendon Press,1903.
    Contributed by: MBLWHOI Library
    BHL Collections: MBLWHOI Library, Woods Hole
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  5. Trees and their life histories. Illustrated from photographs by Henry Irving.
    By: Groom, Percy,
    Publication info: LondonCassell1909
    Contributed by: Robarts - University of Toronto (archive.org)
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  6. Trees; a handbook of forest-botany for the woodlands and the laboratory.
    By: Ward, H. Marshall - Groom, Percy,
    Publication info: CambridgeUniversity Press1904-09
    Contributed by: University of British Columbia Library (archive.org)
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  7. Trees; a handbook of forest-botany for the woodlands and the laboratory, by H. Marshall Ward.
    By: Ward, H. Marshall - Groom, Percy,
    Publication info: Cambridge :At the University press,1904-09.
    Contributed by: University of California Libraries (archive.org)
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