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  1. By: Noble, D.L. - Edminster, C.B. - Shepperd, W.D. - Rocky Mountain Forest and Range Experiment Station (Fort Collins, Colo.)
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library
  2. By: Noble, D.L. - Edminster, C.B. - Shepperd, W.D.
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library
  3. By: Shepperd, W.D. - Jeffers, Richard M. - Ronco, Frank. - Rocky Mountain Forest and Range Experiment Station (Fort Collins, Colo.)
    Publication info: Fort Collins, Colo, Rocky Mountain Forest and Range Experiment Station, Forest Service, U.S. Dept. of Agriculture, 1981
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library
  4. By: Alexander, Robert R. - Shepperd, W.D.
    Publication info: Fort Collins, Colo, USDA, Forest Service, Rocky Mountain Forest and Range Experiment Station, 1984
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library
  5. By: Alexander, Robert R. - Shearer, R.C. - Shepperd, W.D.
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library
  6. By: Alexander, Robert R. - Shepperd, W.D. - Edminster, Carleton B.
    Publication info: Fort Collins, Colo, Rocky Mountain Forest and Range Experiment Station, Forest Service, U.S. Dept. of Agriculture, 1975
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library