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1Work documentPublished in 1983Repositorio Universidad Nacional de Colombia
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2Work documentPublished in 2016Repositorio Universidad Nacional de Colombia
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4Work documentPublished in 1991Repositorio Universidad Nacional de Colombia
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7Work documentPor Cassiani Pérez, Deivis Epifanio; Gutiérrez Polo, Silvio Ricardo; Pérez Cassiani, Martin; Pérez García, Edelnisa MaríaPublished in 2011Repositorio REDICUC - Repositorio CUC
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