Obiekezie, S.O., Okereke, J.N., Anyalogbu, E., Okorondu, S.I. e Ezejiofor, T.I.N. 2006. UNDERGROUND WATER QUALITY OF ROCK MINING IN ISHIAGU, EBONYI STATE, NIGERIA. Estudos de Biologia. 28, 63 (nov. 2006). DOI:https://doi.org/10.7213/reb.v28i63.22724.