Sotomayor-Ramírez, David, and Yusmary Espinoza. “Soil Aggregation and Organic Carbon Fractions in the Rio Grande De Arecibo Watershed”. The Journal of Agriculture of the University of Puerto Rico 94, no. 1-2 (April 1, 2010): 25–39. Accessed November 23, 2024. https://revistas.upr.edu/index.php/jaupr/article/view/2583.