Nwaugo, Victor Oluoha, et al. “PETROLEUM PRODUCED (FORMATION) WATER INDUCED CHANGES IN BACTERIAL QUALITY AND SOIL ENZYMATIC ACTIVITIES IN A FARMLAND IN EGBEMA SOUTHERN NIGERIA”. Estudos De Biologia, vol. 29, nº 66, novembro de 2007, doi:10.7213/reb.v29i66.22751.