| 000 | 00481nam a2200169Ia 4500 | ||
|---|---|---|---|
| 999 |
_c41771 _d41771 |
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| 005 | 20220103123350.0 | ||
| 008 | 180712s9999 xx 000 0 und d | ||
| 020 | _a9231016938 | ||
| 082 |
_a371.3 _bUNI _223 |
||
| 100 | _aUNESCO | ||
| 245 | 4 | _aThe economics of new educational media | |
| 260 |
_aParis _bUNESCO _c1980 |
||
| 300 | _a2v.(v.2-315 p.) | ||
| 500 | _aIncludes bibliography. Partial contents; v.2-Cost and effectiveness | ||
| 650 | _aClassroom techniques | ||
| 942 | _cS | ||