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Please read BHL's Acknowledgment of Harmful Content
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  1. By: Johnson, Floyd A. (Floyd Alfred), - Gohlke, Martin. - Lowrie, James B. - 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
  2. By: Johnson, Floyd A. (Floyd Alfred), - Pacific Northwest Forest and Range Experiment Station (Portland, Or.)
    Publication info: Portland, Or, U.S. Forest Service, Pacific Northwest Forest and Range Experiment Station, U.S. Dept. of Agriculture, [1961]
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library
  3. By: Johnson, Floyd A. (Floyd Alfred), - Worthington, Norman P., - Pacific Northwest Forest and Range Experiment Station (Portland, Or.)
    Publication info: Portland, Or, Pacific Northwest Forest and Range Experiment Station, Forest Service, U.S. Dept. of Agriculture, 1963
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library