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Lua i Stíl Chicago (17ú heag.)Bautista-Ruiz, William Alexander, Mercedes Díaz-Lagos, agus Segundo Agustín Martínez-Ovalle. Characterization of Flying Ashes of a Thermoelectric Plant for Its Possible Use as an Additive in the Manufacture of Cement. Universidad Pedagógica y Tecnológica de Colombia, 2017.
Lua MLA (9ú heag.)Bautista-Ruiz, William Alexander, et al. Characterization of Flying Ashes of a Thermoelectric Plant for Its Possible Use as an Additive in the Manufacture of Cement. Universidad Pedagógica y Tecnológica de Colombia, 2017.
