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  1. By: Pfister, Robert D.
    Publication info: Ogden, Utah :Intermountain Forest and Range Experiment Station, Forest Service, U.S. Dept. of Agriculture,1969.
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library
  2. By: Deitschman, G. H. (Glenn H.) - Pfister, Robert D.
    Publication info: Ogden, Utah :Intermountain Forest & Range Experiment Station, Forest Service, U.S. Dept. of Agriculture,1973.
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library
  3. By: Pfister, Robert D. - Woolwine, Phil C. - Intermountain Forest and Range Experiment Station (Ogden, Utah)
    Publication info: Ogden, Utah :USDA Forest Service, Intermountain Forest and Range Experiment Station,1963.
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library