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Please read BHL's Acknowledgment of Harmful Content
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  1. By: Nelson, E. E. - Martin, N. E. - Williams, R. E. - United States. Forest Service.
    Publication info: [Washington, D.C.?], U.S. Dept. of Agriculture, Forest Service, 1981
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library
  2. By: Nelson, E. E. - Fay, H. A. - Pacific Northwest Forest and Range Experiment Station (Portland, Or.)
    Publication info: Portland, Or, U.S. Dept. of Agriculture, Forest Service, Pacific Northwest Forest and Range Experiment Station, [1985]
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library