000 00274nam a2200109Ia 4500
008 240421s9999 xx 000 0 und d
100 _aParkash, Ravi
245 0 _aProblems Of Educational Research
260 _aNew Delhi
_bCommonwealth
_c2009
300 _a446p.
942 _cBK
999 _c13196
_d13196