Suggested guide for the use of insecticides to control insects affecting crops,
Knipling, E.F.
Suggested guide for the use of insecticides to control insects affecting crops, - Washington 1965 - 200 p. - No. 290; United States Departm .
632.951:632.7
Suggested guide for the use of insecticides to control insects affecting crops, - Washington 1965 - 200 p. - No. 290; United States Departm .
632.951:632.7