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Please read BHL's Acknowledgment of Harmful Content
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  1. By: Ponce, Stanley L. - Gary, Howard L. - 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, 1979
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library
  2. By: Gary, Howard L.
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library
  3. By: Gary, Howard L.
    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