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- USDA1
- USDA (United States Department of Agriculture)1
- adoption2
- adoption behavior1
- adoption process2
- adoption stages1
- adult education1
- advertising2
- agricultural education1
- annual reports1
- attitudes1
- audience analysis1
- audiovisual materials1
- audiovisual training1
- booklet1
- bulletins9
- change1
- circular letters2
- circulars[remove]18
- color2