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  1. By: Mitchell, R. G. - 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, 1974
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library
  2. By: Mitchell, R. G. - 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, 1966
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library
  3. By: Franklin, Jerry F. - Mitchell, R. G. - 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, 1967
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library