- Department of Economic History 1
- Harvard Univ. (1992) 1
- London School of Economics 1
- Poland and visiting Prof. in the Dep. of Scoiology 1
- Univ. of California (1991) 1
- Univ. of Vermont 1
- Visiting prof. 1
- Prof. of Sociology at the Jagiellonian Univ. of Kraków 1
- Prof. of political science 1
- Visiting Prof. 1
1955 - , Visiting prof. of history at Stanford Univ. (1986)
1947 - , Visiting Prof.; Department of Economic History; London School of Economics
1944 - , Prof. of Sociology at the Jagiellonian Univ. of Kraków; Poland and visiting Prof. in the Dep. of Scoiology; Univ. of California (1991)
1942 - , Prof. of political science; Univ. of Vermont; Visiting prof.; Harvard Univ. (1992)
