Response to thinning 60-year-old Douglas-fir
By: by Norman P. Worthington.
Contributors: Pacific Northwest Forest and Range Experiment Station (Portland, Or.)
Series: U.S. Forest Service research note PNW -- 35.
Publisher: Pacific Northwest Forest and Range Experiment Station, U.S. Dept. of Agriculture
Published: 1966
Place of publication: Portland, Or
Language: eng
Subjects: Douglas fir -- Thinning -- Washington (State) -- Olympic National Forest.
Notes: Caption title.

"February 1966."

Includes bibliographical references.