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| LEADER |
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| 942 |
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| 041 |
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|a spa
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| 082 |
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|a 001.42
|b V335
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| 100 |
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|a Vásquez Hidalgo, Antonio
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| 245 |
0 |
0 |
|a Guía metodológica para la elaboración del perfil de investigación
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| 260 |
|
|
|a San Salvador :
|b Universidad de El Salvador,
|c 1998
|
| 300 |
|
|
|a 8 p. ;
|b ilus
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| 650 |
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|a INVESTIGACION CIENTIFICA
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| 650 |
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|a PERFIL DE INVESTIGACION
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