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  1. Die Forstbenutzung. 9. verm. Aufl. bearb. unter Mitwirkung von Heinrich Mayr.
    By: Gayer, Johann Karl, - Mayr, Heinrich
    Publication info: BerlinP. Parey1903
    Contributed by: Gerstein - University of Toronto (archive.org)
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  2. A manual of forestry.
    By: Schlich, William, - Gayer, Johann Karl, - Hess, Richard Alexander,
    Publication info: LondonBradbury, Agnew1906-25
    Contributed by: Robarts - University of Toronto (archive.org)
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  3. A manual of forestry.
    By: Schlich, William, - Gayer, Johann Karl, - Hess, Richard Alexander,
    Publication info: LondonBradbury, Agnew1906-25
    Contributed by: Robarts - University of Toronto (archive.org)
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