Corn root-aphis and methods of controlling it
Davis, J.J.
Corn root-aphis and methods of controlling it - Washington 1917 - 1-12 p. - Corn, Method United States Department of Agriculture. Farmers Bulletin No. 891 .
Corn root-aphis and methods of controlling it - Washington 1917 - 1-12 p. - Corn, Method United States Department of Agriculture. Farmers Bulletin No. 891 .