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1554http://purl.org/coar/version/c_b1a7d7d4d402bccePublished in 2006Repositorio Repositorio UIS
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1555http://purl.org/coar/version/c_b1a7d7d4d402bccePublished in 2005Repositorio Repositorio UIS
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1556http://purl.org/coar/version/c_b1a7d7d4d402bccePublished in 2005Repositorio Repositorio UIS
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1557Article of journalPublished in 2002Repositorio Universidad Nacional de Colombia
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1558
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1559http://purl.org/coar/version/c_b1a7d7d4d402bccePublished in 2004Repositorio Repositorio UIS
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1560Article of journalPublished in 2002Repositorio Universidad Nacional de Colombia
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