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  1. 1
    Carbones colombianos : atlas petrográfico.

    Carbones colombianos : atlas petrográfico. od Gómez Rojas, Olga Patricia; Universidad Pedagógica y Tecnológica de Colombia

    Izdano 2015
    Online


  2. 2
    Presence of contamination by As Cd, As, Pb, Se, and Hg in coals of the Cundiboyacense area, Colombia

    Presence of contamination by As Cd, As, Pb, Se, and Hg in coals of the Cundiboyacense area, Colombia od Gómez-Rojas, Olga Patricia, Díaz-Lagos, Mercedes, Blandón-Montes, Astrid, Martínez-Ovalle, Segundo Agustín

    Izdano 2016
    Online


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