Yazar
helen t blake
3 cilt bulundu.
Cilt sonuçları
Milk dating regulations
Helen T. Blake · U.S. Dept. of Agriculture, Agricultural Marketing Service, Marketing Economics Research Division
36 sayfa · 1960
Milk dating / Dairy laws
Farmer's use of pesticides in 1971, expenditures
Helen T. Blake · Economic Research Service, U.S. Dept. of Agriculture
42 sayfa · 1975
Pesticides / Statistics
Farmers' pesticide expenditures in 1966
Helen T. Blake · Economic Research Service, U.S. Dept. of Agriculture
43 sayfa · 1970
Application / Pesticides