Monitoring larval populations of the Douglas-fir tussock moth and the western spruce budworm on permanent plots
Subtitle: sampling methods and statistical properties of data
By: R.R. Mason and H.G. Paul
Contributors: Paul, H. Gene; Pacific Northwest Research Station (Portland, Or.)
Series: General technical report PNW -- GTR-333; General technical report PNW -- 333
Publisher: U.S. Dept. of Agriculture, Forest Service, Pacific Northwest Research Station
Published: 1994
Place of publication: Portland, Or. (333 S.W. First Ave., P.O. Box 3890, Portland 97208-3890)
Language: eng
Format: Microform
Number of pages: 23
Subjects: Douglas-fir tussock moth; Western spruce budworm; Trees -- Diseases and pests
Notes: Cover title

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"May 1994."

Includes bibliographical references (p. 21-23)

Microfiche. [Washington, D.C.?] : Supt. of Docs., U.S. G.P.O., [1994] 1 microfiche : negative