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  1. By: Siderits, Karl P. - United States. Forest Service. Eastern Region.
    Publication info: [Philadelphia, Pa.], Eastern Region, Forest Service, U.S. Dept. of Agriculture, 1978
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library
  1. By: Buech, Richard R. - Timm, Robert M. - Siderits, Karl P.
    Type: Article
    In: The Canadian field-naturalist
    Volume: 91
    Issue: 4
    Date: 1977
    Page Range: 413--414
    Publication Info: Ottawa Ottawa Field-Naturalists' Club