Columbia subject headings:
Harvard subject headings:
Portugal--Emigration and immigration.
Portuguese--Brazil--Rio Grande do Sul (State)
Portuguese--Rio de la Plata Region (Argentina and Uruguay)
Rio Grande do Sul (Brazil : State)--Emigration and immigration.
Rio de la Plata Region (Argentina and Uruguay)--Emigration and immigration.
Rio de la Plata Region (Argentina and Uruguay)--Ethnic relations.
Princeton subject headings:
Portugal--Emigration and immigration.
Portuguese--Rio de la Plata Region (Argentina and Uruguay).
Rio de la Plata Region (Argentina and Uruguay)--Emigration and immigration.
Rio de la Plata Region (Argentina and Uruguay)--Ethnic relations.