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581Article of journalPor Valbuena Ussa, Édgar Orlay; Castro Moreno, Julio Alejandro; Hernández Pichardo, Análida Altagracia; Vallejo Ovalle, Yolanda Catalina; Trujillo Castro, Laura Marcela; Ariza Bareño, Lizeth AixaPublished in 2014Repositorio Repositorio Institucional UPN
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582Article of journalPublished in 2010Repositorio Repositorio Institucional UPN
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583http://purl.org/coar/resource_type/c_6724Published in 2013Repositorio RiUPTC: Repositorio Institucional UPTC
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584http://purl.org/coar/resource_type/c_6627Presence of contamination by As Cd, As, Pb, Se, and Hg in coals of the Cundiboyacense area, ColombiaPublished in 2016Repositorio RiUPTC: Repositorio Institucional UPTC
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585http://purl.org/coar/resource_type/c_6538Published in 2017Repositorio RiUPTC: Repositorio Institucional UPTC
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586
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587
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588Article of journalPublished in 2008Repositorio RIUCaC - Repositorio U. Católica
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589Doctoral thesisPublished in 2020Repositorio Universidad Nacional de Colombia
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590
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591
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592
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594
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595Doctoral thesisPublished in 2012Repositorio Universidad Nacional de Colombia
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597Por Cardozo, Luis Alberto; Martínez Becerra, Oscar Javier; Moreno Jiménez, Javier; Molano Sotelo, Eric; Borrero Ovalle, Fredy Andrés; Pardo Guzmán, Diego AlexisPublished in 2019Repositorio Universidad Santo Tomás
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599Trabajo de grado de pregradoPublished in 2018Repositorio Séneca: repositorio Uniandes
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600Trabajo de grado de pregradoPublished in 2006Repositorio Séneca: repositorio Uniandes