Authors DOI: https://doi.org/10.1590/S0034-89101975000100013 Downloads PDF (Portuguese) Published 1975-03-01 Issue Vol. 9 No. 1 (1975) Section Thesis Abstracts How to Cite (1975). Revista De Saúde Pública, 9(1), 93-94. https://doi.org/10.1590/S0034-89101975000100013 More Citation Formats ACM ACS APA ABNT Chicago Harvard IEEE MLA Turabian Vancouver AMA Download Citation Endnote/Zotero/Mendeley (RIS) BibTeX