Cardoso de Oliveira, I. et al. 2020. Evaluation of morbidity and infant mortality due to respiratory causes in the age group from 1 to 4 years in Northeastern Brazil. Revista Ciência Plural. 6, 2 (Jun. 2020), 140–155. DOI:https://doi.org/10.21680/2446-7286.2020v6n2ID19910.