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  1. By: West, Stephen D. - Ford, R. Glenn. - Zasada, John C. - Pacific Northwest Forest and Range Experiment Station (Portland, Or.)
    Publication info: [Portland, Or.?], U.S. Dept. of Agriculture, Forest Service, Pacific Northwest Forest and Range Experiment Station, 1980
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library
  2. By: Zasada, John C. - Gregory, R. A. (Robert Aaron) - Institute of Northern Forestry (U.S.)
    Publication info: Juneau, Alaska, Pacific Northwest Forest and Range Experiment Station, Institute of Northern Forestry, U.S. Dept. of Agriculture, 1969
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library
  3. By: Holloway, Patricia. - Zasada, John C. - 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, [1979]
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library
  1. By: Densmore, R - Zasada, John C.
    Type: Article
    In: The Canadian field-naturalist
    Volume: 91
    Issue: 1
    Date: 1977
    Page Range: 58--62
    Publication Info: Ottawa Ottawa Field-Naturalists' Club
  2. By: Zasada, John C. - Lovig, Donald
    Type: Article
    In: The Canadian field-naturalist
    Volume: 97
    Issue: 1
    Date: 1983
    Page Range: 104--106
    Publication Info: Ottawa Ottawa Field-Naturalists' Club
  3. By: Calmes, Mary C. - Zasada, John C.
    Type: Article
    In: The Canadian field-naturalist
    Volume: 96
    Issue: 1
    Date: 1982
    Page Range: 35--40
    Publication Info: Ottawa Ottawa Field-Naturalists' Club
  4. By: Zasada, John C. - Densmore, R
    Type: Article
    In: The Canadian field-naturalist
    Volume: 93
    Issue: 1
    Date: 1979
    Page Range: 77--79
    Publication Info: Ottawa Ottawa Field-Naturalists' Club