Columbia subject headings:
Democracy--Mexico.
Elections--Mexico.
Mexico--Politics and government--20th century.
Harvard subject headings:
Democracy--Mexico
Distrito Federal (Mexico)--Politics and government.
Election districts--Mexico--Case studies.
Elections--Mexico
Elections--Mexico--Case studies.
Mexico--Politics and government--20th century.
Princeton subject headings:
Case studies.
Distrito Federal (Mexico)--Politics and government.
Election districts--Mexico--Case studies.
Elections--Mexico--Case studies.