Ramalho, J.F.G.P. et al. 2000. Heavy metals contamination of a watershed in Caetés by the use of agrochemicals. Pesquisa Agropecuaria Brasileira. 35, 7 (Jul. 2000), 1289–1303. DOI:https://doi.org/10.1590/S1678-3921.pab2000.v35.5917.