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