000 00294nam a2200121Ia 4500
008 230815s9999 xx 000 0 und d
082 _a370.17
_bMAN
100 _aMangal, S K
245 0 _aEssentials of educational technology
260 _aINDIA
_b:PHI
_c2009
300 _a812p.
942 _cBOOK
999 _c15983
_d15983