TY  - BOOK
ED  - United Nations Educational Scientific and Cultural Organizat
TI  - The Economics of new educational media
U1  - 379 21st
PY  - 1977///-82
CY  - Geneva
PB  - UNESCO
KW  - Educational-Costs; Education-Audio-Visual aids; Education-Simultation methods
N1  - Contents: v.1. Present status of research and trends- v.2. Cost and effectiveness- v.3. Cost and effectiveness overview and synthesis
ER  -