000 00269nam a22001217a 4500
999 _c338499
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020 _a9788120335639
082 _a001.42
_bBES.R
100 _aJohn W.Best
245 _aResearch in Education
250 _aTenth
260 _aNewDelhi
_bPHI Learning
_c2010
942 _cBK