Oyarzún Ortega, Carlos E. “Evaluation of the U.S.L.E. For the Prediction of Soil Erosion in Forested Areas of the Bio-Bio River Basin”. Bosque 14, no. 1 (June 30, 1993): 45–54. Accessed March 28, 2026. http://revistas.uach.cl/index.php/bosque/article/view/4596.