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  1. By: Hackel, Eduard,
    Publication info: Coimbre : Imprimerie de l'Université, 1880
    Holding Institution: Biblioteca Digital del Real Jardín Botánico de Madrid
  2. By: Hackel, Eduard,
    Publication info: Kassel, T. Fischer, 1882
    Holding Institution: New York Botanical Garden, LuEsther T. Mertz Library
  3. By: Hackel, Eduard, - Scribner, Frank Lamson, - Southworth, Effie A.
    Publication info: New York, H. Holt, 1890
    Holding Institution: Multiple institutions
  1. By: Hackel, Eduard,
    Type: Article
    In: Sitzungsberichte der Kaiserlichen Akademie der Wissenschaften. Mathematisch-Naturwissenschaftliche Classe. Abt. 1, Mineralogie, Botanik, Zoologie, Geologie und Paläontologie
    Volume: 89
    Date: 1884
    Page Range: 123--136
    Publication Info: Wien, K.-K. Hof- und Staatsdruckerei in Commission bei C. Gerold's Sohn, 1872-