Columbia subject headings:
Poland--Politics and government--1918-1945.
Polish people--Foreign countries--Politics and government.
Polska Partia Socjalistyczna--History.
Socialism--Poland--History.
Harvard subject headings:
Poland--Politics and government--1918-1945
Polish people--Foreign countries--Politics and government
Polska Partia Socjalistyczna
Princeton subject headings:
Poland--Politics and government--1918-1945.
Polish people--Foreign countries--Politics and government.
Polska Partia Socjalistyczna--History.
Socialism--Poland--History.