Modern developments in audiovisual instruction A presentation prepared for the International Conference and Exhibition, Education today and tomorrow-planning the role of audio-visual aids, UNESCO Building, Paris, 11th-15th November 1963.
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| Fformat: | Llyfr |
| Iaith: | English |
| Cyhoeddwyd: |
[New York
s.n.
1964].
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| Pynciau: |