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  1. By: Knechtel, A. - Canada. Forestry Branch.
    Publication info: Ottawa? :s.n.,1908?
    Holding Institution: Canadiana.org (archive.org)
  2. By: Knechtel, A. - New York (State). Forest, Fish and Game Commission.
    Publication info: Albany :J. B. Lyon company, state printers,1907.
    Holding Institution: Library of Congress