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1984
UNESCO
Mexico | Nepal | El Salvador | Africa | Germany FR
Working Group on Information Exchange of Technical and Economic Studies related to Educational Technology, Paris, 1975 | International Council for Educational Media | Eicher, Jean Claude | Orivel, François
3 volumes | Electronic | Microfiche | Paper | online resource | microfiche | volume

v.1: Present status of research and trends. - v.2: Cost and effectiveness. - v.3: Cost and effectiveness overview and synthesis

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