Columbia subject headings:
Río de la Plata Region (Argentina and Uruguay)--Emigration and immigration.
Spain--Emigration and immigration.
Uruguay--Emigration and immigration.
Harvard subject headings:
Rio de la Plata Region (Argentina and Uruguay)--Emigration and immigration.
Spain--Emigration and immigration.
Uruguay--Emigration and immigration.
Princeton subject headings:
Rio de la Plata Region (Argentina and Uruguay)--Emigration and immigration.
Spain--Emigration and immigration.
Uruguay--Emigration and immigration.