Goyenaga-Soto, A., & Vargas-Meneses, C. (2026). Hydrogeological connectivity and microbiological contamination by Escherichia coli: A GIS application in the Santa Marta Micro-Watershed, Tarrazú, Costa Rica. UNED Research Journal, 18(1), e6179. https://doi.org/10.22458/urj.v18i1.6179