000 00270nam a2200109Ia 4500
008 240421s9999 xx 000 0 und d
100 _aAggarwal, J.C.
245 0 _aEducational Research An Introduction
260 _aNew Delhi
_bABD
_c2002
300 _a375p.
942 _cBK
999 _c11425
_d11425