Columbia subject headings:
Harvard subject headings:
Elections--Europe
Elections--Germany
Elections--Germany--North Rhine-Westphalia.
Europe--Politics and government.
Germany--Politics and government.
Voter registration--Europe.
Voter registration--Germany--North Rhine-Westphalia.
Voter registration--Germany.
Voting--Europe.
Voting--Germany--North Rhine-Westphalia.
Voting--Germany.
Princeton subject headings:
Elections--Europe.
Elections--Germany--North Rhine-Westphalia.
Elections--Germany.
Political participation--Europe.
Political participation--Germany--North Rhine-Westphalia.
Political participation--Germany.
Voter turnout--Europe.
Voter turnout--Germany--North Rhine-Westphalia.
Voter turnout--Germany.