Guide to two-story forest type mapping in the Douglas-fir subregion
By: [David A. Bernstein].
Contributors: United States. Forest Service. Pacific Northwest Region.
Publisher: USDA Forest Service, Region 6
Published: 1962
Place of publication: Portland, Or
Language: eng
Subjects: Aerial photography in forestry.; Forests and forestry -- Measurement.; Photographic interpretation.; Douglas fir.
Notes: Cover title.