Natural enemies of pests associated with prairie crops
By: D.S. Yu and J.R. Byers.
Contributors: Byers, J. R.; Canada. Agriculture and Agri-Food Canada.
Series: Agriculture and Agri-Food Canada publication -- 1895/E
Publisher: Minister of Supply and Services Canada
Published: 1993
Place of publication: Ottawa
Language: eng
Notes: At head of cover-title: Agriculture and Agri-Food Canada.