The economics of new educational media :
The economics of new educational media : present status of research and trends /
ICEM.
- Paris : Unesco, 1977.
- 200 p. ; 24 cm.
- Educational methods and techniques ; 1. .
Incluye bibliografia.
92-3-101423-4
LB1028.3 / I55
Incluye bibliografia.
92-3-101423-4
LB1028.3 / I55