Del Valle-González, Reinaldo, Miguel Santiago-Córdova, and Agenol González. “Weed Control With Preemergence Ametryn in Arracacia Xanthorrhiza”. The Journal of Agriculture of the University of Puerto Rico 74, no. 3 (July 1, 1990): 273–280. Accessed June 29, 2022. https://revistas.upr.edu/index.php/jaupr/article/view/6660.