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Please read BHL's Acknowledgment of Harmful Content
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  1. By: Mason, David Townsend,
    Publication info: Washington, D.C, U.S. Dept. of Agriculture, 1915
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library
  2. By: Mason, David Townsend, - United States. Forest Service.
    Publication info: Portland, Ore, The Western pine manufacturers association, 1920
    Holding Institution: University of British Columbia Library
  3. By: Mason, David Townsend,
    Publication info: Washington, D.C, U.S. Dept. of Agriculture, 1915
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library