Douglas fir
Subtitle: a study of the Pacific Coast and Rocky Mountain forms
By: by E.H. Frothingham
Series: Circular / U.S. Department of Agriculture, Forest Service -- 150; Circular (United States. Forest Service) -- 150.
Publisher: U.S. Dept. of Agriculture, Forest Service
Published: 1909
Place of publication: Washington [D.C.]
Language: eng
Number of pages: 38
Subjects: Douglas fir; Trees
Notes: "Issued January 23, 1909."