000 00251nam a2200109Ia 4500
008 240421s9999 xx 000 0 und d
100 _aMangal, S.K.
245 0 _aShiksha Manovighyan
260 _aNew Delhi
_bPHI
_c2008
300 _a769p.
942 _cBK
999 _c11866
_d11866