000 00257nam a2200109Ia 4500
008 241106s2004 xx 000 0 und d
041 _aeng
100 _aV.K.RAO
245 _aEDUCATIONAL RESERCH
260 _aDELHI
_bA.P.H PUB DELHI
_c2004
300 _a164p
999 _c349300
_d349300