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  1. By: Springer, Alan M. - Walker, Wayman - Risebrough, Robert W. - Benfield, Daniel - Ellis, David H. (David Harry) - Mattox, W G - Mindell, David P. - Roseneau, David G.
    Type: Article
    In: The Canadian field-naturalist
    Volume: 98
    Issue: 2
    Date: 1984
    Page Range: 159--166
    Publication Info: Ottawa Ottawa Field-Naturalists' Club