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- catalog contributor b1446724.
- catalog contributor b1446725.
- catalog created "1977-1982.".
- catalog date "1977".
- catalog date "1977-1982.".
- catalog dateCopyrighted "1977-1982.".
- catalog description "Includes bibliographies.".
- catalog description "v. 1. Present status of research and trends -- v. 2. Cost and effectiveness -- v. 3. Cost and effectiveness overview and synthesis.".
- catalog extent "3 v. ;".
- catalog identifier "9231014234 (pbk. : v. 1)".
- catalog isPartOf "Educational methods and techniques ; 1".
- catalog issued "1977".
- catalog issued "1977-1982.".
- catalog language "eng".
- catalog publisher "Paris : Unesco,".
- catalog subject "Educational technology.".
- catalog tableOfContents "v. 1. Present status of research and trends -- v. 2. Cost and effectiveness -- v. 3. Cost and effectiveness overview and synthesis.".
- catalog title "The Economics of new educational media.".
- catalog type "text".