Balsam woolly aphid
By: R.G. Mitchell, G.D. Amman and W.E. Waters.
Contributors: Waters, William E., 1922-; United States. Forest Service.
Series: Forest pest leaflet -- 118.; Forest insect & disease leaflet -- 118.
Publisher: Dept. of Agriculture, Forest Service
Published: 1970
Place of publication: [Washington, D.C.?]
Language: eng
Number of pages: 10
Subjects: Balsam woolly adelgid.; Fir -- Diseases and pests.
Notes: Caption title.

"July 1970."

Includes bibliographical references (p. 9-10).

Also available on the World Wide Web.