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Please read BHL's Acknowledgment of Harmful Content
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  1. By: Koch, Peter, - Intermountain Research Station (Ogden, Utah)
    Publication info: Ogden, UT, Intermountain Research Station, 1987
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library
  2. By: Koch, Peter, - United States. Forest Service.
    Publication info: Washington, D.C, U.S. Dept. of Agriculture, Forest Service, [1985]
    Holding Institution: Prelinger Library