The Economics of new educational media. Vol.3 :
The Economics of new educational media. Vol.3 : Cost and effectiveness overview and synthesis /
Jean-Claude Eicher ... [et al.].
- París : UNESCO, 1982.
- 150 p. : fot.
- Educational methods and techniques ; 1 .
923101997X
371.68 (100) =20 ECO Vol.3.
923101997X
371.68 (100) =20 ECO Vol.3.