000 | 00507nam a2200157Ia 4500 | ||
---|---|---|---|
008 | 131223s9999 xx 000 0 und d | ||
040 | _aISI KOLKATA | ||
041 | _aEnglish | ||
082 |
_a371.26 _bRb-72-39 |
||
100 | _aRubin Donald | ||
245 | _aEstimating casual effects of treatments in experimental and observational studies | ||
260 |
_aNew Jersey _bETS _c1972 |
||
440 | _aEducational Testing Service. Princeton : Research bulletin; 39 | ||
650 | _aEducational tests and measurements | ||
942 | _cBK | ||
999 |
_c81905 _d81905 |