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- development3
- development communication3
- educational radio[remove]3
- information technology[remove]3
- radio3
- information systems2
- Africa1
- Guatemala1
- Guyana1
- Lesotho1
- Nepal1
- appropriate technology1
- communication barriers1
- distance education1
- educational methods1
- educational technology1
- educational television1
- equipment1
- health education1
- indigenous knowledge1