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  1. By: Humphrey, C. J. (Clarence John), - United States. Forest Products Laboratory, Madison. - United States. Forest Service. Forest Products Laboratory, Madison.
    Publication info: Baltimore, Md, American Wood-Preservers' Association, [1920]
    Holding Institution: Cornell University Library
    Subjects: Fungi  Railroad ties  
  2. By: Humphrey, C. J. (Clarence John), - Forest Products Laboratory (U.S.)
    Publication info: Baltimore, Md, American wood-preservers' association, [c1920]
    Holding Institution: University of California Libraries
    Subjects: Fungi  Railroad ties  
  3. By: Forest Products Laboratory (U.S.) - Koehler, Arthur,
    Publication info: Washington, Govt. print. off, 1917
    Holding Institution: University of British Columbia Library
    Subjects: Railroad ties  Timber  Trees  United States  Wood