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_aUNAMX _bspa _cUNAMX _dUNAMX |
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_aLB1028 _bW35 2001 |
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| 100 | 1 |
_aWallen, Norman E., _eautor |
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_aEducational research : _bA guide to the process / _cNorman E. Wallen, Jack R. Fraenkel |
| 250 | _a2nd ed. | ||
| 264 | 1 |
_aMahwah, New Jersey : _bL. Erlbaum, _c2001 |
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| 300 |
_axix, 548 páginas : _bilustraciones |
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_aEducación _xInvestigación |
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_aFraenkel, Jack R., _d1932- _eautor |
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| 336 |
_atexto _2rdacontent |
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| 337 |
_asin medio _2rdamedia |
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| 338 |
_avolumen _2rdacarrier |
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