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12601Investigation reportPor Chica, RicardoPublished in 1990Repositorio Repositorio Minciencias
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12602
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12603
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12604
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12605
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12606
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12607
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12608
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12609
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12610
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12611Investigation reportPor Silva, ArmandoPublished in 1995Repositorio Repositorio Minciencias
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12612Investigation reportPor Thomas, FlorencePublished in 1992Repositorio Repositorio Minciencias
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12613
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12614Investigation reportPor López, ArcersioPublished in 1988Repositorio Repositorio Minciencias
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12615
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12616
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12617
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12618
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12619
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12620