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  1. By: Pfeiffer, Norma Etta.
    Publication info: [n.p.], 1922
    Holding Institution: University of Toronto - Robarts Library
  2. By: Pfeiffer, Norma Etta.
    Publication info: [s.l, s.n.], 1922
    Holding Institution: MBLWHOI Library
  1. By: Pfeiffer, Norma Etta.
    Type: Article
    In: Annals of the Missouri Botanical Garden
    Volume: 9
    Date: 1922
    Page Range: 79--233
    Publication Info: St. Louis, Missouri Botanical Garden Press, 1914-
  2. By: Pfeiffer, Norma Etta.
    Type: Article
    In: Botanical gazette
    Volume: 57
    Issue: 2
    Date: 1914
    Page Range: 122--135
    Publication Info: Hanover, Ind, [publisher not identified], 1876-1991
  3. By: Greenman, J. M. (Jesse More), - Pfeiffer, Norma Etta.
    Type: Article
    In: Annals of the Missouri Botanical Garden
    Volume: 5
    Date: 1918
    Page Range: 205--210
    Publication Info: St. Louis, Missouri Botanical Garden Press, 1914-
  4. By: Pfeiffer, Norma Etta.
    Type: Article
    In: Botanical gazette
    Volume: 61
    Issue: 6
    Date: 1916
    Page Range: 518--522
    Publication Info: Hanover, Ind, [publisher not identified], 1876-1991
  5. By: Pfeiffer, Norma Etta.
    Type: Article
    In: Botanical gazette
    Volume: 66
    Issue: 4
    Date: 1918
    Page Range: 354--363
    Publication Info: Hanover, Ind, [publisher not identified], 1876-1991