http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Cross - National Comparative Survey Research
Theory and Practice. Papers and Proceedings of the Roundtable Conference on Cross - National Comparative Survey Research (Budapest, 25-29 July 1972)
Edit. Alexander Szalai, Riccardo Petrella