Charts for determining sampling rate and number in sample
By: by David Bruce.
Contributors: Pacific Northwest Forest and Range Experiment Station (Portland, Or.)
Series: Research note -- PNW-97.; USDA Forest Service research note PNW -- 97.
Publisher: Pacific Northwest Forest and Range Experiment Station, U.S.D.A. Forest Service
Published: 1969
Place of publication: [Portland, Or.]
Language: eng
Subjects: Sampling.; Forests and forestry -- Sampling.
Notes: Caption title.

"February 1969."