Lima, M.P., Santos, C.E.B. dos, Ribeiro, F.V., Campos, K.S. de C. and Mendonça, J.K.S. 2005. Environmental problems at the of munim river drainage basin at the town of Chapadinha - MA. Sociedade & Natureza. 1, 1 (May 2005). DOI:https://doi.org/10.14393/SN-v1-2005-9718.