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  1. By: Finch, Deborah M. - Stangel, Peter W. - Rocky Mountain Forest and Range Experiment Station (Fort Collins, Colo.) - U.S. Fish and Wildlife Service
    Publication info: Fort Collins, Colo, Rocky Mountain Forest and Range Experiment Station, U.S. Dept. of Agriculture, [1993]
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library