Columbia subject headings:
Harvard subject headings:
Conservatism--Switzerland--Zurich (Canton)--History--20th century.
Peasants--Switzerland--Zurich (Canton)--History--20th century.
Zurich (Switzerland : Canton)--Politics and government--20th century.
Zürcher SVP--History.
Princeton subject headings:
Political parties--Switzerland--Zurich--History--20th century.
Schweizerische Volkspartei--History--20th century.
Zurich (Switzerland)--History--20th century.