Pacific Northwest Forest Experiment Station (Portland, Or.), & Pacific Northwest Forest and Range Experiment Station (Portland, Or.). (1928). Forest research notes. Pacific Northwest Forest Experiment Station.
Chicago-viite (17. p.)Pacific Northwest Forest Experiment Station (Portland, Or.), ja Or.) Pacific Northwest Forest and Range Experiment Station (Portland. Forest Research Notes. Portland, Or.: Pacific Northwest Forest Experiment Station, 1928.
MLA-viite (8. p.)Pacific Northwest Forest Experiment Station (Portland, Or.), ja Or.) Pacific Northwest Forest and Range Experiment Station (Portland. Forest Research Notes. Pacific Northwest Forest Experiment Station, 1928.
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