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1Article of journalPublished in 1990Repositorio Universidad Nacional de Colombia
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2Article of journalPublished in 1990Repositorio Universidad Nacional de Colombia
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3Article of journalPublished in 1990Repositorio Universidad Nacional de Colombia
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4Article of journalPublished in 2008Repositorio Universidad Nacional de Colombia
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5Article of journalPublished in 2008Repositorio Universidad Nacional de Colombia
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8BookPublished in 2009Repositorio RED: Repositorio Educativo Digital UAO
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9BookPublished in 2003Repositorio RED: Repositorio Educativo Digital UAO
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10BookPublished in 2001Repositorio RED: Repositorio Educativo Digital UAO
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11BookPublished in 2003Repositorio RED: Repositorio Educativo Digital UAO
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