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1Article of journalPor Barker, StephenPublished in 2012Repositorio Repositorio U. de Caldas
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2Article of journalPor Barker, StephenPublished in 2012Repositorio Repositorio Institucional U. Caldas
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3Article of journalPor Barker, StephenPublished in 2014Repositorio Repositorio Institucional U. Caldas
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4Article of journalPor Barker, StephenPublished in 2014Repositorio Repositorio U. de Caldas