| 000 | 00331nam a2200097Ia 4500 | ||
|---|---|---|---|
| 008 | 120224s9999 xx 000 0 und d | ||
| 082 |
_a300. 723 _bBLA |
||
| 100 | _aBlalock, jr. Hubert M. | ||
| 245 | _aCausal inferences in nonexperimental research. | ||
| 260 |
_bUniversity of North Carolina Press _aChapel Hill _c1964 |
||
| 999 |
_c135923 _d135923 |
||