Effect of thinning on form of young-growth Douglas-fir trees
By: by Vern P. Yerkes.
Contributors: Pacific Northwest Forest and Range Experiment Station (Portland, Or.)
Series: Research note -- no. 194.; Research notes (Pacific Northwest Forest and Range Experiment Station (Portland, Or.)) -- no. 194.
Publisher: U.S. Dept. of Agriculture, Forest Service, Pacific Northwest Forest and Range Experiment Station
Published: 1960
Place of publication: Portland, Or
Language: eng
Subjects: Douglas fir -- Growth -- Washington (State) -- Voight Creek Experimental Forest.; Douglas fir -- Thinning -- Washington (State) -- Voight Creek Experimental Forest.
Notes: Caption title.

"November 1960."

Includes bibliographical reference (p. 2).

Also issued online.