Almeida, Pedro Augusto Marcondes de, Ana Maria Bertini de Oliveira, Antonio Guilherme Moreira Porto, Domingos Delascio, Neusa Maria Vigorito, Prescilla Chow, Abes Mohamed Amed, Ari Dalla, Krikor Boyacyan, and Adelheid Baugartner. 1975. “ A Critical Study of the Evaluation of Foetal Maturity through Citology of the Amniotic Fluid: Comparison With Other Methods ”. Revista De Saúde Pública 9 (3): 343-50. https://doi.org/10.1590/S0034-89101975000300007.