Columbia subject headings:
Harvard subject headings:
Europe, German-speaking--Emigration and immigration.
Germany--Emigration and immigration--Economic aspects.
Germany--Emigration and immigration--Social aspects.
Refugees--Europe, German-speaking.
Princeton subject headings:
Europe, German-speaking--Emigration and immigration.
Germany--Emigration and immigration--Economic aspects.
Germany--Emigration and immigration--Social aspects.
Refugees--Europe, German-speaking.