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  1. By: Campbell, Robert A.
    Publication info: Asheville, N.C. :U.S. Dept. of Agriculture, Forest Service, Southeastern Forest Experiment Station,[1954]
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library
  2. By: Campbell, Robert A. - Southeastern Forest Experiment Station (Asheville, N.C.)
    Publication info: Asheville, N.C. :U.S. Dept. of Agriculture, Forest Service, Southeastern Forest Experiment Station,[1962]
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library
  3. By: Campbell, Robert A.
    Publication info: Asheville, N.C. :U.S. Dept. of Agriculture, Forest Service, Southeastern Forest Experiment Station,[1957]
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library