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  1. By: Ruggiero, Leonard F. - 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, [1994]
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library
  1. By: Squires, John R - McKelvey, Kevin S. - Ruggiero, Leonard F.
    Type: Article
    In: The Canadian field-naturalist
    Volume: 118
    Issue: 4
    Date: 2004-10-01
    Page Range: 583--589
    Publication Info: Ottawa Ottawa Field-Naturalists' Club