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- applications (apps)1
- cell phones1
- communication research[remove]1
- conferences1
- consultants1
- dealers1
- direct e-mail1
- direct mail1
- e-mail1
- farm journals1
- farmers1
- information sources[remove]1
- media effectiveness1
- media research1
- media use1
- mobile communication systems1
- newsletters1
- radio1
- rural broadcasts1
- seminars[remove]1