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301Article of journalPublished in 1991Repositorio Universidad Nacional de Colombia
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302Article of journalPublished in 1991Repositorio Universidad Nacional de Colombia
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303Article of journalPublished in 1986Repositorio Universidad Nacional de Colombia
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304Article of journalPublished in 1972Repositorio Universidad Nacional de Colombia
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305Article of journalPublished in 1997Repositorio Universidad Nacional de Colombia
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306Article of journalPublished in 1991Repositorio Universidad Nacional de Colombia
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307Published in 1905Repositorio Repositorio EAFIT
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308Trabajo de grado de pregradoPublished in 2015Repositorio Repositorio Digital CECAR
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309Article of journalPublished in 1993Repositorio Universidad Nacional de Colombia
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310Published in 2018Repositorio Repositorio UIS
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311Trabajo de grado de pregradoPublished in 2021Repositorio Repositorio Institucional USTA
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315
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316
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317Published in 2013Repositorio Repositorio CESA
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318Published in 1999Repositorio Repositorio CESA
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319Article of journalPublished in 2016Repositorio Repositorio UDEM
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320Article of journalPublished in 1967Repositorio Universidad Nacional de Colombia
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