000 00305nam a22001217a 4500
020 _a9788120335639
082 _a370.72
_bBES.R
100 _aBest, John W
245 _aResearch in education
_cJohn W Best and James V Kahn
250 _a10th ed
260 _aNew Delhi:
_bPHI Learning;
_c2012
942 _cBK
999 _c324055
_d324055