Columbia subject headings:
Political parties--Switzerland--Basel-Landschaft (Canton)--History--20th century.
Switzerland--Politics and government--20th century.
Voting--Switzerland--Basel-Landschaft (Canton)--History--20th century.
Harvard subject headings:
Basel Region (Switzerland)--Politics and government--20th century.
Political parties--Switzerland--Basel Region--History--20th century.
Voting--Switzerland--Basel Region--History--20th century.
Princeton subject headings:
Basel Region (Switzerland)--Politics and government--20th century.
Political parties--Switzerland--Basel Region--History--20th century.
Voting--Switzerland--Basel Region--History--20th century.