Ibim D. ASSESSMENT VULNERABILITY OF AQUIFER VIA DRASTIC MODEL AND COMPARISON WITH G-O-D MODEL USING GEOPHYSICAL PARAMETERS, IMO RIVER BASIN, SOUTHEASTERN NIGERIA. bwjournal [Internet]. 2021 Nov. 12 [cited 2026 Sep. 21];. Available from: https://mail.bwjournal.org/index.php/bsjournal/article/view/286