| 000 | nam a22 7a 4500 | ||
|---|---|---|---|
| 999 |
_c171568 _d171568 |
||
| 020 | _a978-93-80138-57-2 | ||
| 041 | _aeng | ||
| 082 |
_223rd. _a370.72 _bDAS |
||
| 100 | _aDas, Ajay | ||
| 245 |
_aEducational research _cAjay Das |
||
| 260 |
_aDelhi _bSwastik Publications _c2011 |
||
| 300 |
_a280p.; _c23cm. |
||
| 650 | _aEducation-Research | ||
| 942 | _cBK | ||