Ontario weeds
Subtitle: descriptions, illustrations and keys to their identification
By: by J.F. Alex and C.M. Switzer.
Contributors: Switzer, C. M., 1929-; Montgomery, F. H. 1902-
Series: Publication / Ministry of Agriculture and Food, Ontario -- 505; Publication (Ontario. Ministry of Agriculture and Food) -- 505
Publisher: Ontario Ministry of Agriculture and Food
Published: 1988
Place of publication: Toronto
Language: eng
Number of pages: 200
Subjects: Weeds -- Ontario -- Identification.
Notes: Rev. ed. of: Ontario weeds / by F.H. Montgomery and C.M. Switzer.

Includes index.

"Agdex 640."

"RP-8-88-3M" -- P. [4] of cover.