European corn borer and its control
Caffrey, D.J., Worthley, L.H.
European corn borer and its control - Washington 1922 - 1-45 p. - Corn United States Department of Agriculture. Farmers Bulletin No. 1294 .
European corn borer and its control - Washington 1922 - 1-45 p. - Corn United States Department of Agriculture. Farmers Bulletin No. 1294 .