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  1. By: Roedner, Beverly J. - Hamilton, David A. - Evans, Keith E. - North Central Forest Experiment Station (Saint Paul, Minn.)
    Publication info: St. Paul, Minn, North Central Forest Experiment Station, Forest Service, U.S.D.A, 1978
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library
  1. By: Roberts, Nathan M. - Crimmins, Shawn M. - Hamilton, David A. - Gallagher, Elsa
    Type: Article
    In: The Canadian field-naturalist
    Volume: 126
    Issue: 1
    Date: 2012-10-02
    Page Range: 28--30
    Publication Info: Ottawa Ottawa Field-Naturalists' Club
  2. By: Roberts, Nathan M. - Rabeni, Charles F. - Stanovick, John S. - Hamilton, David A.
    Type: Article
    In: The Canadian field-naturalist
    Volume: 122
    Issue: 4
    Date: 2008-10-01
    Page Range: 303--311
    Publication Info: Ottawa Ottawa Field-Naturalists' Club