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  1. By: Heyer, Gustav
    Publication info: Erlangen, F. Enke, 1856
    Holding Institution: University of Toronto - Gerstein Science Information Centre
    Subjects: Forest soils  Soils and climate  
  2. By: Hartig, Theodor,
    Publication info: Stuttgart, J.G. Cotta, 1877
    Holding Institution: University of Toronto - Gerstein Science Information Centre
    Subjects: Forests and forestry  Soils and climate