TY  - BOOK
ED  - Internacional Council For Educational Media.
TI  - The economics of new educational media: present status of research and trends 
T2  - Educational methods and techniques
SN  - 92-3-101423-4
AV  - LB1028.3 I55
PY  - 1977///
CY  - Paris
PB  - Unesco
N1  - Incluye bibliografia
ER  -