Authors DOI: https://doi.org/10.1590/S0034-89101969000100013 Downloads PDF (Portuguese) Published 1969-06-01 Issue Vol. 3 No. 1 (1969) Section Abstracts How to Cite (1969). Revista De Saúde Pública, 3(1), 108-111. https://doi.org/10.1590/S0034-89101969000100013 More Citation Formats ACM ACS APA ABNT Chicago Harvard IEEE MLA Turabian Vancouver AMA Download Citation Endnote/Zotero/Mendeley (RIS) BibTeX