Columbia subject headings:
Europe--Emigration and immigration--Economic aspects--Encyclopedias.
Europe--Emigration and immigration--Encyclopedias.
Immigrants--Europe--History--Encyclopedias.
Harvard subject headings:
Emigration and immigration.
Europe--Emigration and immigration--Economic aspects--Encyclopedias.
Europe--Emigration and immigration--Encyclopedias.
Immigrants--Europe--History--Encyclopedias.
Immigrants--Europe--History.
Princeton subject headings:
Encyclopedias.
Europe--Emigration and immigration--Economic aspects--Encyclopedias.
Europe--Emigration and immigration--Encyclopedias.
Immigrants--Europe--History--Encyclopedias.