Factors affecting establishment of Douglas fir seedlings
By: by Leo A. Isaac
Series: Circular / United States Department of Agriculture -- no. 486; Circular (United States. Dept. of Agriculture) -- no. 486.
Publisher: U.S. Dept. of Agriculture
Published: 1938
Place of publication: Washington, D.C
Language: eng
Number of pages: 46
Subjects: Seed; Douglas fir
Notes: Caption title.

"Contribution from Forest Service."

Includes bibliographical references.