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Please read BHL's Acknowledgment of Harmful Content
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  1. By: Schmid, J. M. - Mata, S. A. - Averill, Robert D. - Rocky Mountain Forest and Range Experiment Station (Fort Collins, Colo.) - United States. Forest Service.
    Publication info: [Fort Collins, Colo.], USDA Forest Service, Rocky Mountain Forest and Range Experiment Station, 1989
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library
  2. By: Averill, Robert D.
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library