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  1. By: Ghaffariyan, Mohammad Reza
    Type: Article
    In: Silva Balcanica
    Volume: 23
    Issue: 1
    Date: 2022-4-21
    Page Range: 21--36
    Publication Info: Sofia, Bulgaria Forest Research Institute - Bulgarian Academy of Sciences (FRI-BAS) [2001]-
    Subjects: Farm tractor  productivity  Skidding  Timber harvesting  Time studies  Work cycle
  2. By: Ghaffariyan, Mohammad Reza
    Type: Article
    In: Silva Balcanica
    Volume: 24
    Issue: 1
    Date: 2023-3-22
    Page Range: 55--68
    Publication Info: Sofia, Bulgaria Forest Research Institute - Bulgarian Academy of Sciences (FRI-BAS) [2001]-
    Subjects: Forest biomass  productivity  Recovery  Residues  Supply chain  Timber harvesting