Barreto, Mauriclo L., and Sebastião Loureiro. “ The Effect of Schistosoma Mansoni Infection on Child Morbidity in the State of Bahia, Brazil: I— Analysis at the Ecological Level ”. Revista Do Instituto De Medicina Tropical De São Paulo, vol. 26, no. 4, Aug. 1984, pp. 230-5, https://revistas.usp.br/rimtsp/article/view/87308.