Barros, Marilisa Berti de Azevedo. 1981. “ Hospital Morbidity and Mortality Among Children under One Year of Age, Ribeirão Preto, SP (Brazil), 1975 ”. Revista De Saúde Pública 15 (3): 308-20. https://doi.org/10.1590/S0034-89101981000300007.