Authors DOI: https://doi.org/10.1590/S0034-89101971000200014 Downloads PDF (Portuguese) Published 1971-12-01 Issue Vol. 5 No. 2 (1971) Section Abstracts How to Cite (1971). Revista De Saúde Pública, 5(2), 367-368. https://doi.org/10.1590/S0034-89101971000200014 More Citation Formats ACM ACS APA ABNT Chicago Harvard IEEE MLA Turabian Vancouver AMA Download Citation Endnote/Zotero/Mendeley (RIS) BibTeX