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682669Article of journalPublished in 2010Repositorio Repositorio Institucional UPN
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682670Article of journalPublished in 1978Repositorio Repositorio Institucional UPN
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682671Article of journalPublished in 2012Repositorio Repositorio Institucional UPN
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682672Article of journalPublished in 2011Repositorio Repositorio Institucional UPN
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682673Article of journalPublished in 2011Repositorio Repositorio Institucional UPN
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682674Article of journalPor Vásquez, TomasPublished in 1999Repositorio Repositorio Institucional UPN
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682675Article of journalPublished in 2010Repositorio Repositorio Institucional UPN
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682676Article of journalPublished in 1992Repositorio Repositorio Institucional UPN
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682677Article of journalPublished in 2000Repositorio Repositorio Institucional UPN
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682678Article of journalPublished in 2012Repositorio Repositorio Institucional UPN
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682679Article of journalPublished in 2010Repositorio Repositorio Institucional UPN
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682680Article of journalPor Roa García, Paola Andrea; Osorio Gonzáles, Angelica Del Pilar; Forero, Eliath; Buitrago O., Andrea MarcelaPublished in 2010Repositorio Repositorio Institucional UPN
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