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  1. By: Sieg, Carolyn Hull. - 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, [1991]
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library
  1. By: Fowler, James F - Sieg, Carolyn Hull.
    Type: Article
    In: Madroño; a West American journal of botany
    Volume: 57
    Date: 2010
    Page Range: 213--219
    Publication Info: Berkeley, California Botanical Society,
  2. By: Becker, Dale M. - Sieg, Carolyn Hull.
    Type: Article
    In: The Canadian field-naturalist
    Volume: 101
    Issue: 3
    Date: 1997
    Page Range: 369--372
    Publication Info: Ottawa Ottawa Field-Naturalists' Club
  3. By: Becker, Dale M. - Sieg, Carolyn Hull.
    Type: Article
    In: The Canadian field-naturalist
    Volume: 101
    Issue: 3
    Date: 1997
    Page Range: 398--403
    Publication Info: Ottawa Ottawa Field-Naturalists' Club