Smith, B. A., F. Sánchez-Nieva, M. A. González, and M. Matos-Maldonado. “A Comparison of Several Noninverting Ion-Exchange Systems Used in the Purification of Puerto Rican Sugarcane Juices”. The Journal of Agriculture of the University of Puerto Rico 48, no. 3 (July 1, 1964): 247–254. Accessed April 18, 2024. https://revistas.upr.edu/index.php/jaupr/article/view/12992.