| 000 | 00339nam a2200109Ia 4500 | ||
|---|---|---|---|
| 100 | _aVaidya, Narendera | ||
| 942 | _cBK | ||
| 245 |
_aHow children discover knowledge _bTheoretical and practical foundations of student investigations in science |
||
| 260 |
_aOxford & IBH publishing co., New Delhi _c1974 |
||
| 082 | _a507 Vai | ||
| 300 | _axv, 315 | ||
| 999 |
_c2834 _d2834 |
||