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  1. By: Lightle, Paul C. (Paul Charles), - Hawksworth, Frank G. (Frank Goode), - 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, 1973
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library
  2. By: Lightle, Paul C. (Paul Charles), - Andrews, Stuart R., - 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, 1968
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library
  3. By: Myers, Clifford A. (Clifford Albert), - Hawksworth, Frank G. (Frank Goode), - Lightle, Paul C. (Paul Charles), - 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, 1972
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library