Kahlenberg, Georg. 1988. “Datenhandbuch, Band II: State, Economy and Society in WesternEurope 1915-1975. A Data Handbook, Band II: The Growth of Lndustrial Societies and Capitalist Economies”. Wirtschaft Und Gesellschaft 14 (1): 173-74. https://journals.akwien.at/index.php/wug/article/view/1201.