Poplars, principal tree willows and walnuts of the Rocky Mountain region
By: by George B. Sudworth.
Contributors: United States. Dept. of Agriculture.
Series: Technical bulletin / United States Department of Agriculture -- no. 420; Technical bulletin (United States. Dept. of Agriculture) -- no. 420.
Publisher: U.S. Dept. of Agriculture
Published: 1934
Place of publication: Washington
Language: eng
Number of pages: 112
Subjects: Willows -- Rocky Mountains Region -- Classification.; Walnut -- Rocky Mountains Region -- Classification.; Poplar -- Rocky Mountains Region -- Classification.
Genres: Classification.
Notes: Cover title.

Literature cited: p. 105-111.