JOHN, Unwana N.; ESSIEN, Gloria. E.; AKPAN-IDIOK, Ackley. U.; JOHN, Nkereuwem M. Surface charge characteristics of coastal plain soils in Cross River State, Nigeria. Journal Of Agriculture, Forestry & Environment , [S. l.], v. 3, n. 1, p. 1–12, 2018. Disponível em: https://jafe.net.ng/index.php/home/article/view/29. Acesso em: 7 jun. 2025.