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  1. By: Maki, Wilbur R. - Olson, Douglas, - Schallau, Con H.
    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
  2. By: Schallau, Con H. - Maki, Wilbur R. - Pacific Northwest Research Station (Portland, Or.)
    Publication info: Portland, Or, U.S. Dept. of Agriculture, Forest Service, Pacific Northwest Research Station, [1986]
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library
  3. By: Maki, Wilbur R. - Schallau, Con H. - Beuter, John H. - Pacific Northwest Forest and Range Experiment Station (Portland, Or.)
    Publication info: Portland, Or, Pacific Northwest Forest and Range Experiment Station, [1968]
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library