- Assistant University Warsaw, Poland, 1959-1963, senior assistant Poland, 1964-1974, assistant professor history Poland, 1975-1985, professor Poland, since 1985.
- Workers, Women, And Social Change In Poland, 1870-1939 (Variorum Collected Studies Series)
- The studies collected here deal with social and cultural changes in Polish lands during the early phases of industrialisation, i.
- Author: Genesis of 1906 Scission in Socialist Party, 1965 (Journal Polityka award 1966), Working Class in Poland 1870-1914, 1974 (Journal Polityka award 1975), Workers of Warsaw, 1985 (Journal Polityka award 1986). Editor, co-author: Working-Class Culture in Poland, 1986, Women and Society in Poland, 7 vols., 1990-2001, Women in Poland 1918-1939, 2000.