Columbia subject headings:
Elections--Germany--History--20th century.
Elections--United States--History--20th century.
Voting--Germany--History--20th century.
Voting--United States--History--20th century.
Harvard subject headings:
Elections--Germany
Elections--United States
Voting research.
Princeton subject headings:
Elections--Germany--History--20th century.
Elections--United States--History--20th century.
Voting--Germany--History--20th century.
Voting--United States--History--20th century.