Columbia subject headings:
Harvard subject headings:
Werdenberg (Switzerland)--Economic conditions--20th century.
Werdenberg (Switzerland)--History--20th century.
Werdenberg (Switzerland)--Politics and government--20th century.
Princeton subject headings:
Werdenberg (Switzerland)--Economic conditions--20th century.
Werdenberg (Switzerland)--History--20th century.
Werdenberg (Switzerland)--Politics and government--20th century.