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Please read BHL's Acknowledgment of Harmful Content
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  1. By: Silen, Roy R. - Rowe, Kenneth E. - Pacific Northwest Forest and Range Experiment Station (Portland, Or.)
    Publication info: Portland, Ore, Pacific Northwest Forest and Range Experiment Station, Forest Service, U.S. Dept. of Agriculture, [1971]
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library