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1Investigation reportPublished in 1990Repositorio Repositorio Minciencias
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2Investigation reportPublished in 2003Repositorio Repositorio Minciencias
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3Investigation reportPublished in 2003Repositorio Repositorio Minciencias
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4Investigation reportPublished in 1998Repositorio Repositorio Minciencias
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5Investigation reportPublished in 1988Repositorio Repositorio Minciencias
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6Investigation reportPublished in 1991Repositorio Repositorio Minciencias
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7Investigation reportPublished in 1995Repositorio Repositorio Minciencias
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11Investigation reportPublished in 2002Repositorio Repositorio Minciencias
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13Investigation reportPublished in 1995Repositorio Repositorio Minciencias
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14Investigation reportPor Romero, MauricioPublished in 2000Repositorio Repositorio Minciencias
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