Environmental monitoring of magnetic iron phases of urban water reservoir lake sediments (Taiaçupeba Lake, metropolitan region of São Paulo, Brazil) by using Mössbauer spectroscopy - Franco, Daniel Ribeiro; Berquo, Thelma; Imbernon, Rosely Aparecida Liguori; Partiti, Carmen Silvia de Moya; Enzweiler, Jacinta (Environmental Geology, 2007)