Columbia subject headings:
Brazil--Emigration and immigration.
Colonization.
Emigration and immigration law.
Great Britain--Emigration and immigration.
United States--Emigration and immigration.
Harvard subject headings:
Brazil--Emigration and immigration.
Colonization.
Emigration and immigration law.
Great Britain--Emigration and immigration.
United States--Emigration and immigration.
Princeton subject headings: