Columbia subject headings:
Harvard subject headings:
Mexico--Economic conditions.
Sugar trade--Mexico--San Cristóbal Region--History.
Sugar workers--Mexico--San Cristóbal Region.
Princeton subject headings:
Sugar trade--Mexico--Veracruz (State)--History.
Sugar workers--Mexico--Veracruz (State)--History.
Syndicalism--Mexico--Veracruz (State)--History.
Veracruz-Llave (Mexico : State)--Economic conditions.