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1521
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1522Published in 2007Repositorio Repositorio Institucional USTA
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1523
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1524
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1525Published in 2016Repositorio Repositorio UDEM
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1526
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1527
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1528
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1529
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1530
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1531
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1532
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1533
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1534
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1535
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1536Published in 2007Repositorio Universidad Santo Tomás
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1537Published in 2007Repositorio Repositorio Institucional USTA
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1538Por José Amar Amar; Universidad del Norte; Luz Elena Ocampo Otálvaro; Universidad Pontificia Bolivariana de MedellínPublished in 2012Repositorio Repositorio Uninorte
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1539Published in 2011Repositorio Repositorio Uninorte
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1540Article of journalPublished in 2010Repositorio Repositorio Universidad Javeriana
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