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1http://purl.org/coar/resource_type/c_18ccPublished in 1992Repositorio Universidad Nacional de Colombia
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2http://purl.org/coar/resource_type/c_18ccPublished in 2005Repositorio Universidad Nacional de Colombia
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3http://purl.org/coar/resource_type/c_18ccPublished in 2005Repositorio Universidad Nacional de Colombia
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4http://purl.org/coar/resource_type/c_18ccPublished in 1992Repositorio Universidad Nacional de Colombia
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5http://purl.org/coar/resource_type/c_18ccPublished in 1992Repositorio Universidad Nacional de Colombia
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6http://purl.org/coar/resource_type/c_18ccPublished in 2005Repositorio Universidad Nacional de Colombia
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7http://purl.org/coar/resource_type/c_18ccPublished in 1992Repositorio Universidad Nacional de Colombia
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8http://purl.org/coar/resource_type/c_18ccPublished in 1992Repositorio Universidad Nacional de Colombia