Comments: Douglas fir: a study of the Pacific Coast and Rocky Mountain forms.

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Bibliographic Details
Main Author:	Frothingham, E. H.
Corporate Author:	United States. Department of Agriculture.
Format:	Book
Language:	English
Published:	Washington, Govt. Print. Off., 1909.
Series:	U.S. Forest Service. Circular, 150
Subjects:	Conifers. Trees > Pacific Coast. Trees > Rocky Mountains.
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