Columbia subject headings:
Harvard subject headings:
Oligarchy--Mexico--Sonora (State)--History.
Regionalism--Mexico--Sonora (State)--History.
Sonora (Mexico : State)--Commerce--History.
Sonora (Mexico : State)--Politics and government.
Princeton subject headings:
Oligarchy--Mexico--Sonora (State)--History.
Regionalism--Mexico--Sonora (State)--History.
Sonora (Mexico : State)--Commerce--History.
Sonora (Mexico : State)--Politics and government.