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1Article of journalPublished in 1993Repositorio Universidad Nacional de Colombia
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2Article of journalPublished in 2014Repositorio Universidad Nacional de Colombia
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4Article of journalPublished in 1943Repositorio Universidad Nacional de Colombia
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5Published in 2011Repositorio Universidad Nacional de Colombia
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6Article of journalPublished in 1943Repositorio Universidad Nacional de Colombia
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9Article of journalPublished in 1944Repositorio Universidad Nacional de Colombia
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12Article of journalPublished in 2001Repositorio Universidad Nacional de Colombia
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13Article of journalPublished in 1946Repositorio Universidad Nacional de Colombia
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14Article of journalPor Vargas, CarlosPublished in 2012Repositorio Universidad Nacional de Colombia
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15Article of journalPublished in 2006Repositorio Universidad Nacional de Colombia
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16Article of journalPublished in 2017Repositorio Universidad Nacional de Colombia
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17Article of journalPublished in 1993Repositorio Universidad Nacional de Colombia
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18Article of journalPor Vries, PeerPublished in 2013Repositorio Universidad Nacional de Colombia
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19Article of journalPublished in 2003Repositorio Universidad Nacional de Colombia
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20Article of journalPublished in 1959Repositorio Universidad Nacional de Colombia
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