Cardoso, R.N.C., Gonçalves, E.D., Deus, J.C.S. de and Teixeira, L.C.G.M. 2018. Analysis of vulnerability and risk the contamination of semiconfined aquiferes in the Island of Cotijuba/PA. Águas Subterrâneas. 32, 2 (Jun. 2018). DOI:https://doi.org/10.14295/ras.v32i2.29153.