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  1. By: Heer, Oswald,
    Publication info: Basel : H. Georg, 1881
    Holding Institution: University Library, University of Illinois Urbana Champaign
  2. By: Heer, Oswald, - Nordenskiöld, A. E. (Adolf Erik), - Heer, Oswald,
    Publication info: Stockholm : P.A. Norstedt & söner, 1876.
    Holding Institution: New York Botanical Garden, LuEsther T. Mertz Library
    BHL Collections: New York Botanical Garden
  3. By: Heer, Oswald, - Heer, Oswald,
    Publication info: Stockholm : P.A. Norstedt & Söner, 1878.
    Holding Institution: New York Botanical Garden, LuEsther T. Mertz Library
    BHL Collections: New York Botanical Garden
  4. By: Heer, Oswald,
    Publication info: Lisbonne, Imprimerie de l'Académie royale des sciences, 1881.
    Holding Institution: Smithsonian Libraries
  5. By: Heer, Oswald,
    Holding Institution: Missouri Botanical Garden, Peter H. Raven Library
    BHL Collections: Engelmann Papers, Missouri Botanical Garden
  6. By: Heer, Oswald, - Heer, Oswald,
    Publication info: Stockholm : P.A. Norstedt & Söner, 1869.
    Holding Institution: New York Botanical Garden, LuEsther T. Mertz Library
    BHL Collections: New York Botanical Garden
  7. By: Heer, Oswald,
    Publication info: Stockholm : P.A. Norstedt, 1869.
    Holding Institution: Canadiana.org (archive.org)
  8. By: Heer, Oswald, - Cramer, Karl Eduard, - Nordenskiöld, A. E. (Adolf Erik), - Schröter, Carl,
    Publication info: Zürich : F. Schulthess, 1868-1883.
    Holding Institution: Multiple institutions
  9. By: Heer, Oswald, - Malmgren, Anders Johan, - Nordenskiöld, A. E. (Adolf Erik), - Heer, Oswald,
    Publication info: Stockholm : P.A. Norstedt & söner, 1871.
    Holding Institution: New York Botanical Garden, LuEsther T. Mertz Library
    BHL Collections: New York Botanical Garden
  10. By: Escher von der Linth, Arnold, - Heer, Oswald,
    Publication info: [S.l. : s.n., 1853].
    Holding Institution: Harvard University, Museum of Comparative Zoology, Ernst Mayr Library
  11. By: Heer, Oswald,
    Publication info: Leipzig, W. Engelmann, 1847-1853.
    Holding Institution: Smithsonian Libraries
  12. By: Heer, Oswald, - Heywood, James,
    Publication info: London : Longmans, Green, 1876.
    Holding Institution: University of California Libraries (archive.org)
  13. By: Heer, Oswald,
    Publication info: Zurich, 1860.
    Holding Institution: Cornell University Library
  14. By: Heer, Oswald,
    Publication info: Zürich : Naturforschenden Gesellschaft, 1853
    Holding Institution: University Library, University of Illinois Urbana Champaign