Sequential sampling of Douglas-fir tussock moth populations
By: by Richard R. Mason.
Contributors: Pacific Northwest Forest and Range Experiment Station (Portland, Or.)
Series: Research note -- PNW-102.; USDA Forest Service research note PNW -- 102.
Publisher: Pacific Northwest Forest and Range Experiment Station, U.S.D.A. Forest Service
Published: 1969
Place of publication: [Portland, Or.]
Language: eng
Number of pages: 11
Subjects: Douglas fir tussock moth -- Counting.
Notes: Caption title.

"April 1969."

Includes bibliographical references.