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Subject Term
- audiovisual media[remove]20
- videotapes[remove]20
- extension communication8
- video7
- educational media6
- educational media video5
- educational video5
- audiovisual equipment4
- audiovisual training4
- development communication4
- media effectiveness4
- rural development4
- development3
- educational films3
- teaching aids3
- television3
- Portugal2
- agricultural development2
- audience participation2
- extension agents2