Rivera, Alfonso Sepúlveda. “Relationship Between a Healty Vegetation Index (NDVI) and the Productivity of Wheat”. Revista Geográfica de Chile Terra Australis 55, no. 1 (December 31, 2019): 24–34. Accessed November 21, 2024. https://www.revistaterraaustralis.cl/index.php/rgch/article/view/34.