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  1. By: Dennis, Donald F.
    Publication info: Broomall, Pa, U.S. Dept. of Agriculture, Forest Service, Northeastern Forest Experiment Station, 1983
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library
  2. By: Dennis, Donald F. - Northeastern Forest Experiment Station (Radnor, Pa.)
    Publication info: [Radnor, Pa.] (100 Matsonford Rd., Suite 200, P.O. Box 6775, Radnor 19087), U.S. Dept. of Agriculture, Forest Service, Northeastern Forest Experiment Station, [1990]
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library
  3. By: Birch, Thomas W. - Dennis, Donald F. - Northeastern Forest Experiment Station (Radnor, Pa.)
    Publication info: Broomall, Pa. (370 Reed Rd., Broomall, Pa. 19008), Forest Service, U.S. Dept. of Agriculture, Northeastern Forest Experiment Station, 1980
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library
  4. By: Dennis, Donald F. - Birch, Thomas W. - Northeastern Forest Experiment Station (Radnor, Pa.)
    Publication info: Broomall, Pa, U.S. Dept. of Agriculture, Forest Service, Northeastern Station [sic], 1981
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library