Bighead knapweed (Centaurea macrocephala Puschk.)
By: [by Cindy Roche'].
Contributors: Washington State University. Cooperative Extension.; Oregon State University. Extension Service.; University of Idaho. Cooperative Extension System.; United States. Dept. of Agriculture.
Series: PNW -- 386.; Weeds; PNW (Series) -- 386.; Weeds (Pacific Northwest Cooperative Extension)
Publisher: Washington State University Cooperative Extension; Oregon State University Extension Service; University of Idaho Cooperative Extension System; U.S. Dept. of Agriculture
Published: 1991
Place of publication: [Olympia, Wash.]; [Corvallis, Or.]; [Moscow, Idaho]; [Washington, D.C.]
Language: eng
Subjects: Knapweeds -- Control.
Other titles: Centaurea macrocephala Puschk.
Notes: Title from caption.

"Published December 1991"--P. 2.

"A Pacific Northwest extension publication."