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  1. By: Szaro, Robert C. - Balda, Russell P. (Russell Paul),
    Publication info: Fort Collins, Colo, Rocky Mountain Forest and Range Experiment Station, Forest Service, U.S. Dept. of Agriculture, 1979
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library
  2. By: Szaro, Robert C. - Severson, Kieth E. - Patton, David R. - 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, [1988?]
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library
  3. By: Szaro, Robert C. - Belfit, Scott C.
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library
  1. By: Szaro, Robert C.
    Type: Article
    In: The Wilson bulletin
    Volume: 90
    Issue: 1
    Date: 1978
    Page Range: 112--118
    Publication Info: Columbus, Ohio, Wilson Ornithological Society, 1894-