An exploratory study of cone maturity in noble fir
By: by Jerry F. Franklin
Contributors: Pacific Northwest Forest and Range Experiment Station (Portland, Or.)
Series: U.S. Forest Service research note PNW -- 21; U.S. Forest Service research note PNW -- 21.
Publisher: Pacific Northwest Forest and Range Experiment Station, U.S. Dept. of Agriculture
Published: 1965
Place of publication: Portland, Or
Language: eng
Number of pages: 12
Subjects: Seeds; Noble fir; Viability
Notes: Caption title.

"April 1965."

Includes bibliographical references (p. 11-12).