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12481
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12482
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12483
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12484
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12485Article of journalPublished in 1996Repositorio Universidad Nacional de Colombia
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12486
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12487
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12488Article of journalPublished in 2005Repositorio Universidad Nacional de Colombia
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12489Article of journalPublished in 1985Repositorio Universidad Nacional de Colombia
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12490
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12491
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12492
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12493
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12494
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12495
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12496
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12497
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12498
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12499
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12500Article of journalPublished in 2013Repositorio Repositorio Institucional UPN
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