Columbia subject headings:
Harvard subject headings:
Poland--Politics and government--1918-1945
Political parties--Poland--History--20th century
Polskie Stronnictwo Ludowe "Wyzwolenie"--History--20th century.
Princeton subject headings:
Poland--Politics and government--1918-1945.
Polskie Stronnictwo Ludowe "Wyzwolenie"--History.