Liu, Lii-chyuan, José A. Dumas, and Carmen L. Cacho. “Picloram Groundwater Contamination from Pasture Use”. The Journal of Agriculture of the University of Puerto Rico 81, no. 3-4 (October 1, 1997): 211–218. Accessed June 28, 2022. https://revistas.upr.edu/index.php/jaupr/article/view/3644.