Columbia subject headings:
Borderlands--Central America--History.
Borderlands--Mexico, Southeast--History.
Borderlands--Political aspects--Central America.
Borderlands--Political aspects--Mexico, Southeast.
Borderlands--Social aspects--Central America.
Borderlands--Social aspects--Mexico, Southeast.
Harvard subject headings:
Borderlands--Central America--History.
Borderlands--Mexico, Southeast--History.
Borderlands--Political aspects--Central America.
Borderlands--Political aspects--Mexico, Southeast.
Borderlands--Social aspects--Central America.
Borderlands--Social aspects--Mexico, Southeast.
Princeton subject headings:
Borderlands--Central America--History.
Borderlands--Mexico, Southeast--History.
Borderlands--Political aspects--Central America.
Borderlands--Political aspects--Mexico, Southeast.
Borderlands--Social aspects--Central America.
Borderlands--Social aspects--Mexico, Southeast.