Predators of the spruce budworm / [by Daniel T. Jennings and Hewlette S. Crawford, Jr.].

by Jennings, Daniel T.
[Washington, D.C.?] : U.S. Dept. of Agriculture, Forest Service, Cooperative State Research Service, [1985].

Series: Agriculture handbook (United States. Department of Agriculture) ; no. 644.
Spruce budworms handbook.