Authors DOI: https://doi.org/10.1590/S0034-89101977000200015 Downloads PDF (Portuguese) Published 1977-06-01 Issue Vol. 11 No. 2 (1977) Section Erratum How to Cite (1977). Revista De Saúde Pública, 11(2), 0-0. https://doi.org/10.1590/S0034-89101977000200015 More Citation Formats ACM ACS APA ABNT Chicago Harvard IEEE MLA Turabian Vancouver AMA Download Citation Endnote/Zotero/Mendeley (RIS) BibTeX