MAXWELL, Ocheri; MILE, Iyange; OBETA, M.C. Seasonal Variation in Nitrate Levels in Hand Dug Wells in Makurdi Metropolis. Pakistan Journal of Nutrition, Pakistan, v. 9, n. 6, p. 539–542, 2010. DOI: 10.3923/pjn.2010.539.542. Disponível em: https://pjnonline.org/pjn/article/view/1217. Acesso em: 6 sep. 2025.