Authors DOI: https://doi.org/10.1590/S0034-89101971000100017 Downloads PDF (Portuguese) Published 1971-06-01 Issue Vol. 5 No. 1 (1971) Section Abstracts How to Cite (1971). Revista De Saúde Pública, 5(1), 155-158. https://doi.org/10.1590/S0034-89101971000100017 More Citation Formats ACM ACS APA ABNT Chicago Harvard IEEE MLA Turabian Vancouver AMA Download Citation Endnote/Zotero/Mendeley (RIS) BibTeX