Columbia subject headings:
Harvard subject headings:
Emigration and immigration--Government policy
Europe--Emigration and immigration--21st century.
Refugees--Government policy--Europe.
Turkey--Emigration and immigration--21st century.
Princeton subject headings:
Emigration and immigration--Government policy--Europe.
Europe--Emigration and immigration--21st century.
Refugees--Government policy--Europe.
Turkey--Emigration and immigration--21st century.