Ezekwe, I.C., Odu, N.N. e Gasa, A. 2014. Pollution from non-oil sources in the river Nun downstream of Yenegoa Town, South-South Nigeria. Estudos de Biologia. 36, (nov. 2014). DOI:https://doi.org/10.7213/estud.biol.36.086.AO02.