Ortiz Palma, Nelson Humberto, and Rigoberto Mayor Polania. “Identification and Description of Advancing the Process of Desertification in the Desert Strategic Ecosystem Tatacoa. Period: 1975-1993”. Ingeniería y Región 10 (December 30, 2013): 149–158. Accessed May 20, 2024. https://journalusco.edu.co/index.php/iregion/article/view/767.