Okoli, E., Akaolisa , C.C.Z., Ubechu, B.O., Agbasi, O.E. and Szafarczyk, A. 2024. Using VES and GIS-Based DRASTIC Analysis to Evaluate Groundwater Aquifer Contamination Vulnerability in Owerri, Southeastern Nigeria. Ecological Questions. 35, 3 (Mar. 2024), 1–27. DOI:https://doi.org/10.12775/EQ.2024.031.