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Please read BHL's Acknowledgment of Harmful Content
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  1. By: Driver, B. L. (Beverly L.) - Peterson, George L.
    Publication info: Fort Collins, Colo, U.S. Dept. of Agriculture, Forest Service, Rocky Mountain Forest and Range Experiment Station, [1990]
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library
  2. By: Peterson, George L. - Brown, Thomas C. - Rosenthal, D. H. - Rocky Mountain Forest and Range Experiment Station (Fort Collins, Colo.)
    Publication info: Fort Collins, Colo, U.S. Dept. of Agriculture, Forest Service, Rocky Mountain Forest and Range Experiment Station, 1987
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library