000			00557nam a2200157Ia 4500
008			131223s9999 xx 000 0 und d
040			_aISI KOLKATA
041			_aEnglish
082			_a371.26 _bRb-73-52
100			_aWard W C
245			_aDisadvantaged children and their first school experiences _bets-head start longitudinal study - development of self regulatory behaviors
260			_aNew Jersey _bETS _c1973
440			_aEducational Testing Service. Princeton : Research bulletin; 52
650			_aEducational tests and measurements
942			_cBK
999			_c79808 _d79808