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1Article of journalPublished in 1984Repositorio Repositorio UCC
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2Article of journalPublished in 1989Repositorio Repositorio UCC
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3Article of journalPublished in 1990Repositorio Repositorio UCC
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4Article of journalPublished in 1980Repositorio Repositorio UCC
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6Article of journalPor Díaz Quiroga, Oliva; Universidad Cooperativa de Colombia; Flórez Flórez, Rosalba; Hernández Meneses, Mylene; González Sanmiguel, Silvana; Rodríguez Pachón, Carmen; Vera de Varón, Ana EldaPublished in 1991Repositorio Repositorio UCC
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