Zeitschrift für PräventivmedizinJanuary 1970, Volume 15, Issue 1, pp 413–416 | Cite asMitteilungenArticleThis is a preview of subscription content, log in to check access.PreviewUnable to display preview. Download preview PDF.Unable to display preview. Download preview PDF.Copyright information© Schweiz. Serum- & Impfinstitut 1970