Columbia subject headings:
Harvard subject headings:
Immigrants--Europe--Congresses.
Immigrants--France--Congresses.
Turks--Europe--Congresses.
Turks--France--Congresses.
Princeton subject headings:
Europe--Emigration and immigration--Congresses.
France--Emigration and immigration--Congresses.
Turks--Europe--Congresses.
Turks--France--Congresses.