Spruce budworms handbook : how to distinguish between old and new egg masses of the western spruce budworm.

Bibliographic Details

Corporate Authors:	United States. Cooperative State Research Service, Canada/United States Spruce Budworms Program
Format:	Government Document Book
Language:	English
Published:	[Washington, D.C.?] : U.S. Dept. of Agriculture, Forest Service, Cooperative State Research Service, [1984]
Series:	Agriculture handbook (United States. Department of Agriculture) ; no. 623.
Subjects:	Western spruce budworm.