Pérez-Castillo, A. G., Barboza-Mora, R., & Ramos-Matarrita, J. F. (2013). Water quality of the Refugio Mata Redonda and surrounding rice paddies, Guanacaste, Costa Rica. Agronomía Mesoamericana, 24(2), 379–392. https://doi.org/10.15517/am.v24i2.12538