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261Article of journalPublished in 1972Repositorio Universidad Nacional de Colombia
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262Article of journalPublished in 1991Repositorio Universidad Nacional de Colombia
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263Article of journalPublished in 1986Repositorio Universidad Nacional de Colombia
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264Article of journalPublished in 1991Repositorio Universidad Nacional de Colombia
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265Article of journalPublished in 1991Repositorio Universidad Nacional de Colombia
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266Article of journalPublished in 1997Repositorio Universidad Nacional de Colombia
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267Published in 2018Repositorio Repositorio Universidad de la Sabana
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268Published in 2020Repositorio Repositorio UniAri
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269Article of journalPublished in 1993Repositorio Universidad Nacional de Colombia
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270Published in 2018Repositorio Repositorio UIS
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271Published in 1905Repositorio Repositorio EAFIT
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272Trabajo de grado de pregradoPublished in 2021Repositorio Repositorio Institucional USTA
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273
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274
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275Published in 2013Repositorio Repositorio CESA
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276Published in 1999Repositorio Repositorio CESA
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277Article of journalPublished in 1987Repositorio Universidad Nacional de Colombia
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278Article of journalPublished in 1967Repositorio Universidad Nacional de Colombia
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279
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280Article of journalPublished in 2016Repositorio Repositorio UDEM
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