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680821
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680822Article of journalPublished in 1964Repositorio Universidad Nacional de Colombia
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680823Article of journalPublished in 2013Repositorio Universidad Nacional de Colombia
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680824Article of journalPor Tovar, LeonardoPublished in 1987Repositorio Universidad Nacional de Colombia
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680825Article of journalPublished in 1962Repositorio Universidad Nacional de Colombia
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680826Article of journalPublished in 1987Repositorio Universidad Nacional de Colombia
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680827Article of journalPublished in 2001Repositorio Universidad Nacional de Colombia
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680828
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680829
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680830
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680831
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680832
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680833
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680834
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680835
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680836
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680837
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680838
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680839Article of journalPublished in 2018Repositorio Séneca: repositorio Uniandes
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680840Trabajo de grado de pregradoPublished in 2006Repositorio RIUD: repositorio U. Distrital