Columbia subject headings:
Harvard subject headings:
Dominican Republic--Emigration and immigration.
Dominicans--Employment--Puerto Rico.
Dominicans--Puerto Rico--Economic conditions.
Dominicans--Puerto Rico--Social conditions.
Princeton subject headings:
Dominican Republic--Emigration and immigration.
Dominicans--Puerto Rico--Social life and customs.
Immigrants--Puerto Rico.
Puerto Rico--Emigration and immigration.