Vacuum collection of Douglas-fir pollen for supplemental mass pollinations
By: D.L. Copes ... [et al.]
Contributors: Copes, Donald L; Pacific Northwest Research Station (Portland, Or.)
Series: Research note PNW -- RN-503; Research note PNW -- 503
Publisher: U.S. Dept. of Agriculture, Forest Service, Pacific Northwest Research Station
Published: 1991
Place of publication: [Portland, Or. (319 S.W. Pine St., Portland 97208)]
Language: eng
Subjects: Douglas fir -- Pollen -- Northwestern States; Pollination -- Northwestern States
Notes: Caption title

Distributed to depository libraries in microfiche

"January 1991."

Includes bibliographical references (p. 8)