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41Article of journalPor Vantin, SerenaPublished in 2019Repositorio RIUCaC - Repositorio U. CatólicaGet full text
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42Part of bookPor Núñez Rojas, Ariel César; Vargas Zuluaga, Nora Margarita; Carantón Sánchez, Ilvar Josué; Gallo Consuegra, Liliana; Gómez Etayo, ElizabethPublished in 2020Repositorio RED: Repositorio Educativo Digital UAOGet full text
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44Article of journalPublished in 2022Repositorio REDICUC - Repositorio CUCGet full text
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45Article of journalPublished in 1998Repositorio Repositorio Institucional UPNGet full text
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47Article of journalPor Gavrilov, Boris Yakovlevich; Voronin, Mikhail Yu.; Sizova, Viktoriya Nikolaevna; Lapin, Vyacheslav Olegovich; Demidova-Petrova, Elizaveta V.Published in 2021Repositorio REDICUC - Repositorio CUCGet full text
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50Article of journalPublished in 2008Repositorio Repositorio Universidad de CartagenaGet full text
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51Article of journalPublished in 2024Repositorio Repositorio Universidad de CartagenaGet full text
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52Article of journalPublished in 2025Repositorio Repositorio Universidad de CartagenaGet full text
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53Article of journalPor Akinyemi, Segun Ajayi; Hower, James C.; Madukwe, Henry; Nyakuma, Bemgba Bevan; Nasirudeen, Mohammed B.; Olanipekun, Timileyin; Mudzielwana, Rabelani; Gitari, Mugera Wilson; Silva, Luis F. OPublished in 2022Repositorio REDICUC - Repositorio CUC“... that influence their quality. Coal samples from different open cast coal mines in the middle BTB were examined...”
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