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1821Article of journalPublished in 1972Repositorio Universidad Nacional de Colombia
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1822Article of journalPublished in 1973Repositorio Universidad Nacional de Colombia
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1823Article of journalPublished in 1999Repositorio Universidad Nacional de Colombia
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1824Article of journalPublished in 1970Repositorio Universidad Nacional de Colombia
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1825Article of journalPublished in 1976Repositorio Universidad Nacional de Colombia
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1826Article of journalPublished in 1969Repositorio Universidad Nacional de Colombia
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1827Article of journalPublished in 1967Repositorio Universidad Nacional de Colombia
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1828Article of journalPublished in 1975Repositorio Universidad Nacional de Colombia
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1829Article of journalPublished in 1974Repositorio Universidad Nacional de Colombia
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1830Article of journalPublished in 1979Repositorio Universidad Nacional de Colombia
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1831Article of journalPublished in 1979Repositorio Universidad Nacional de Colombia
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1832Article of journalPublished in 1969Repositorio Universidad Nacional de Colombia
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1833Article of journalPublished in 1979Repositorio Universidad Nacional de Colombia
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1834Article of journalPublished in 1993Repositorio Universidad Nacional de Colombia
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1835Article of journalPublished in 1980Repositorio Universidad Nacional de Colombia
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1836Article of journalPublished in 1986Repositorio Universidad Nacional de Colombia
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1837Article of journalPublished in 1973Repositorio Universidad Nacional de Colombia
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1838Article of journalPublished in 1972Repositorio Universidad Nacional de Colombia
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1839Article of journalPublished in 1986Repositorio Universidad Nacional de Colombia
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1840Article of journalPublished in 1979Repositorio Universidad Nacional de Colombia
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