@article{article9a71fb23,
title   = {Schistosomiasis mansoni in the Baixada Ocidental Maranhense, state of Maranhão, Brazil: cross-sectional studies performed in 1987 and 1993},
author = {Cutrim, Raimundo Nonato Martins and Chieffi, Pedro Paulo and Moraes, José Cássio de},
year = {1998},
journal   = {Revista do Instituto de Medicina Tropical de São Paulo}
}