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    <title>Geochemical evaluation of the middle Magdalena basin, Colombia</title>
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    <namePart>Ramon, J. C.</namePart>
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      <title>CT&amp;F : Ciencia,Tecnología y Futuro (Bucaramanga)</title>
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    <identifier type="issn">0122-5383</identifier>
    <identifier type="local">116836</identifier>
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      <text>Volumen 01, Número 03, Diciembre 1997, p. 47-66</text>
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