| 000 | 00375nam a2200133Ia 4500 | ||
|---|---|---|---|
| 100 | _aUNESCO | ||
| 020 | _a92 3 101423 4 | ||
| 942 | _cBK | ||
| 654 | _a | ||
| 245 |
_aEconomics of new educational media _bPresent status of research and trends |
||
| 260 |
_aParis _bUnited Nations Educational, Scientific and Cultural Organization _c1977 |
||
| 082 | _a371. 3 | ||
| 300 | _c24 cm | ||
| 999 |
_c359278 _d359278 |
||
| 041 | _aeng | ||