Columbia subject headings:
Harvard subject headings:
Communism
Communism--Congresses
Dickstein, Szymon, 1858-1884
Dickstein, Szymon, 1858-1884--Congresses.
Luxemburg, Rosa, 1871-1919
Poland--History--1864-1918--Sources--Congresses.
Polish question--Congresses.
Polish question.
Socialism
Socialism--Congresses
Socialist parties--Europe--Congresses.
Princeton subject headings:
Communism--Congresses.
Dickstein, Szymon, 1858-1884--Congresses.
Poland--History--1864-1918--Sources--Congresses.
Polish question--Congresses.
Socialism--Congresses.
Socialist parties--Europe--Congresses.