Sampling Western Spruce Budworm larvae by frequency of occurrence on lower crown branches /

Bibliographic Details
Main Author:	Mason, Richard R.
Corporate Author:	Pacific Northwest Research Station (Portland, Or.)
Other Authors:	Beckwith, R. C.
Format:	Government Document Book
Language:	English
Published:	[Portland, Or. (319 S.W. Pine St., P.O. Box 3890, Portland 97208)] : U.S. Dept. of Agriculture, Forest Service, Pacific Northwest Research Station, [1990]
Series:	Research note PNW ; 497.
Subjects:	Western spruce budworm > Oregon > Statistics. Spruce > Diseases and pests > Oregon > Statistics. Sampling (Statistics)

Description
Item Description:	Caption title. Distributed to depository libraries in microfiche. "November 1990."
Physical Description:	11 pages : illustrations ; 28 cm.
Bibliography:	Includes bibliographical references (pages 10-11).