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Please read BHL's Acknowledgment of Harmful Content
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  1. By: Zon, Raphaël, - Duerr, William A. (William Allen),
    Publication info: Washington, D.C, U.S. Dept. of Agriculture, 1942
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library
  2. By: Duerr, William A. (William Allen), - Evans, Thomas Carlyle. - Morrill, George E. - Appalachian Forest Experiment Station (Asheville, N.C.)
    Publication info: Asheville, N.C, U.S. Dept. of Agriculture, Forest Service, Appalachian Forest Experiment Station, [1943]
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library
  3. By: Guttenberg, Sam. - Duerr, William A. (William Allen), - Southern Forest Experiment Station (New Orleans, La.) - United States. Department of Agriculture.
    Publication info: New Orleans, La, USDA Forest Service, Southern Forest Experiment Station, 1949
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library