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  1. Billeder af nordens flora, ved A. Mentz og C.H. Ostenfeld.
    By: Mentz, August, - Ostenfeld, C. H.
    Edition: Anden forbedrede udg.
    Publication info: København,G.E.C. Gad's forlag,1917-1927.
    Contributed by: Mertz Library, The New York Botanical Garden
    BHL Collections: New York Botanical Garden
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  2. Plantevæxten paa Færøerne : med sæerlig hensyntagen til blomsterplanterne / C.H. Ostenfeld.
    By: Ostenfeld, C. H.
    Publication info: København :Gyldendal,1906.
    Contributed by: Mertz Library, The New York Botanical Garden
    BHL Collections: New York Botanical Garden
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  3. Pteridophyta, Gymnospermae and Monocotyledones / by O. Gelert and C.H. Ostenfeld.
    By: Gelert, O. - Ostenfeld, C. H.
    Publication info: Copenhagen :Nordiske forlag,1902.
    Contributed by: Mertz Library, The New York Botanical Garden
    BHL Collections: New York Botanical Garden
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