Weeds-- giant hogweed (Heracleum mantegazzianum Somm. & Lev.)
By: [by Cindy Roché].
Contributors: Washington State University. Cooperative Extension Service.
Series: PNW bulletin -- 429.; PNW (Series) -- 429.
Publisher: Washington State University Extension Service
Published: 1992
Place of publication: [Pullman, Wash.]
Language: eng
Notes: "December 1992."