Technical and economic criteria for media selection and planning in educational institutions.
| Awdur Corfforaethol: | |
|---|---|
| Fformat: | Llyfr |
| Iaith: | English |
| Cyhoeddwyd: |
Paris
Unesco
1984.
|
| Cyfres: | Educational studies and documents; new ser.
no.48 |
| Pynciau: |