Columbia subject headings:
Harvard subject headings:
Dominican Republic--History--1930-1961.
Dominican Republic--Relations--Haiti.
Foreign workers, Haitian--Dominican Republic--History--20th century.
Haiti--Relations--Dominican Republic.
Haitians--Dominican Republic--History--20th century.
Massacres--Dominican Republic--History--20th century.
Noncitizens--Dominican Republic--History--20th century.
Princeton subject headings:
Dominican Republic--History--1930-1961.
Dominican Republic--Relations--Haiti.
Haiti--Relations--Dominican Republic.
Haitians--Dominican Republic--History--20th century.
Massacres--Dominican Republic--History--20th century.
Noncitizens--Dominican Republic--History--20th century.