Chika Agaba, Kenneth, et al. “Bacterio-Chemical Assessment of Hand-Dug Wells in New Haven, Enugu State Nigeria”. International Journal of Sciences: Basic and Applied Research (IJSBAR), vol. 44, no. 2, Mar. 2019, pp. 87-93, https://gssrr.org/JournalOfBasicAndApplied/article/view/9220.