Vorwort Authors Gyula Béda PDF How to Cite Béda, G. “Vorwort”, Periodica Polytechnica Mechanical Engineering, 21(2), pp. 63–64, 1977. More Citation Formats Periodica Polytechnica Numbered ACM ABNT Chicago Harvard IEEE Vancouver Download Citation Endnote/Zotero/Mendeley (RIS) BibTeX Issue Vol. 21 No. 2 (1977) Section Articles