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008 230721b |||||||| |||| 00| 0 eng d
020 _a9788120337237
082 _a372.3
_bMAN
100 _aMangal, S. K.
245 _aEssentials of educational technology
_cS. K. Mangal & Uma Mangal
260 _aDelhi
_bPHI Learning
_c2022
300 _a812p.
650 _aEducation
700 _aMangal, Uma
942 _2ddc
_cBK
999 _c6415
_d6415