A simple index of stand density for Douglas-fir
By: Robert O. Curtis.
Contributors: United States. Forest Service.
Publisher: USDA Forest Service]
Published: 1982
Place of publication: [Portland, Or.?
Language: eng
Number of pages: 94
Subjects: Douglas fir.; Plant competition.
Notes: Caption title.

Repr. from Forest science, vol. 28, no. 1, 1982.

Bibliography: p. 94.

"Purchased by USDA Forest Service for official use"--P. 92.