Authors DOI: https://doi.org/10.1590/S0034-89101970000200010 Downloads PDF (Portuguese) Published 1970-12-01 Issue Vol. 4 No. 2 (1970) Section Abstracts How to Cite (1970). Revista De Saúde Pública, 4(2), 223-226. https://doi.org/10.1590/S0034-89101970000200010 More Citation Formats ACM ACS APA ABNT Chicago Harvard IEEE MLA Turabian Vancouver AMA Download Citation Endnote/Zotero/Mendeley (RIS) BibTeX