Yazar
h h walkden
8 cilt bulundu.
H. H. Walkden · Marketing Research Division, Agricultural Marketing Service, U.S. Dept. of Agriculture
25 sayfa · 1958
Wheat / Storage / Diseases and injuries / Corn
H. H. Walkden · Marketing Research Division, Agricultural Marketing Service, U.S. Dept. of Agriculture
21 sayfa · 1958
Wheat / Storage / Diseases and injuries / Corn
H. H. Walkden · Marketing Research Division, Agricultural Marketing Service, U.S. Dept. of Agriculture
48 sayfa · 1959
Corn / Storage / Diseases and injuries / Wheat / Insecticides
H. H. Walkden · Marketing Research Division, Agricultural Marketing Service, U.S. Dept. of Agriculture
27 sayfa · 1958
Wheat / Corn / Storage / Diseases and injuries
H. H. Walkden · U.S. Dept. of Agriculture
52 sayfa · 1950
Diseases and pests / Cutworms / Forage plants / Grain / Army-worms
J. H. Walkden · Davyhulme (Wesley) Methodist Church?
32 sayfa · 1955
Davyhulme (Wesley) Methodist Church