Leaf-hopper injurious to apple trees
Lathrop, Frank H.
Leaf-hopper injurious to apple trees - Geneva 1918 - 185-200 p. - Leaf, Hopper, Apple New York Agricultural Experiment Station. Bulletin No. 451 .
Leaf-hopper injurious to apple trees - Geneva 1918 - 185-200 p. - Leaf, Hopper, Apple New York Agricultural Experiment Station. Bulletin No. 451 .