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| 005 | 20220120101630.0 | ||
| 008 | 220120b ||||| |||| 00| 0 eng d | ||
| 020 | _a9788120337244 | ||
| 100 | _aMANGAL, S. K. | ||
| 245 | _aEDUCATIONAL TECHNOLOGY | ||
| 260 |
_aDELHI _bP H I _c2019 |
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| 300 | _a988 p. | ||
| 650 | _aEDUCATION | ||
| 942 |
_2ddc _cBK |
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