Technical and economic criteria for media selection and planning in educational institutions.
Technical and economic criteria for media selection and planning in educational institutions.
- Paris : UNESCO, 1984.
- 81 p. ; fot.
- Educational series and documents; new series ; 48. .
9231022342
371.68 =20 CRI No. 48.
9231022342
371.68 =20 CRI No. 48.