Columbia subject headings:
Mexico (Mexico : State)--Administrative and political divisions.
Mexico, Valley of (Mexico)--Administrative and political divisions.
Harvard subject headings:
Distrito Federal (Mexico)--History--Sources.
Distrito Federal (Mexico)--History.
Mexico (Mexico : State)--Historical geography.
Mexico (Mexico : State)--History--Sources.
Mexico (Mexico : State)--History.
Princeton subject headings:
Distrito Federal (Mexico)--History--Sources.
Distrito Federal (Mexico)--History.
Mexico (Mexico : State)--Historical geography.
Mexico (Mexico : State)--History--Sources.
Mexico (Mexico : State)--History.