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| 999 |
_c3603 _d3603 |
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| 003 | OSt | ||
| 005 | 20180821121749.0 | ||
| 008 | 180821b xxu||||| |||| 00| 0 eng d | ||
| 082 |
_a372.3 _bUPA |
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| 100 | _aUpadhyay, Sanjay Kumar | ||
| 245 |
_aEducational technology _cSanjay Kumar Upadhyay |
||
| 260 |
_aAgra _bRakhi Publication _c2014 |
||
| 300 | _a152p. | ||
| 650 | _aEducation | ||
| 942 |
_2ddc _cBK |
||