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Please read BHL's Acknowledgment of Harmful Content
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  1. By: Potter, Dale R. - Hendee, John C. - Evison, Lee Earl. - Pacific Northwest Forest and Range Experiment Station (Portland, Or.)
    Publication info: Portland, Or, Pacific Northwest Forest and Range Experiment Station, U.S. Dept. of Agriculture, Forest Service, 1973
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library