AYODELE J.T.; MOHAMMED S. S. Comparative Techniques for Extraction of Ni, Cu, Zn and Pb in Guinea Corn Fields of Kaduna Metropolis, Nigeria. International Journal of Research in Chemistry and Environment (IJRCE), [S. l.], v. 1, n. 1, p. 142–146, 2011. Disponível em: https://ijrce.org/index.php/ijrce/article/view/69. Acesso em: 9 may. 2024.