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Lua i Stíl Chicago (17ú heag.)Olarte Riaño, José Ricardo, Daniel Fernando García Espitia, agus Adriana Posada Arrubla. A Perspective of Environmental and Geographic Engineering from the Scholarly Production of the Undergraduate Program. Universidad Pedagógica y Tecnológica de Colombia, 2021.
Lua MLA (9ú heag.)Olarte Riaño, José Ricardo, et al. A Perspective of Environmental and Geographic Engineering from the Scholarly Production of the Undergraduate Program. Universidad Pedagógica y Tecnológica de Colombia, 2021.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.
