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_aVillalpando Nava, José Manuel, _d1926- _929627 |
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_aManual de investigación pedagógica / _cJosé Manuel Villalpando Nava. |
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_aMéxico : _bPorrúa, _c2005. |
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_a293 p. : _bgráfs. |
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_aEducación _xInvestigación _94070 |
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