| 000 | 00581nam a22002175a 4500 | ||
|---|---|---|---|
| 001 | 2803 | ||
| 003 | CL-ChBUA | ||
| 005 | 20120815102810.0 | ||
| 008 | 070301s1973 ag 000 0dspa | ||
| 020 | _a9500180421 | ||
| 040 |
_aCL-ChBUA _cCL-ChBUA |
||
| 082 | 0 | 0 | _a300.72 |
| 090 |
_c2803 _d2803 |
||
| 100 | 1 | _aCampbell, Donald T. | |
| 245 | 1 | 0 | _aDiseños experimentales y cuasiexperimentales en la investigación social |
| 260 |
_bAmorrortu. _a _c1973. |
||
| 300 |
_a158 p. _c20 cm. |
||
| 504 | _aBibl., índice. | ||
| 650 | 4 | _aCIENCIAS SOCIALES - INVESTIGACIONES. | |
| 942 | _cLIB | ||
| 999 |
_c2803 _d2803 |
||