Dale Ritchey, K., Lucas V. Ramírez, Ricardo Goenaga, and Victor Chew. “Rapid Methods for Determining Tanier (Xanthosoma spp.) Root Responses to Soil Acidity”. The Journal of Agriculture of the University of Puerto Rico 74, no. 4 (October 1, 1990): 365–373. Accessed November 26, 2024. https://revistas.upr.edu/index.php/jaupr/article/view/6676.