Columbia subject headings:
College student mobility--Europe--History--Congresses.
College students--Europe--History--Congresses.
Europe--Emigration and immigration--History--Congresses.
Foreign study--Europe--History--Congresses.
Immigrants--Education (Higher)--Europe--History--Congresses.
Students, Foreign--Europe--History--Congresses.
Universities and colleges--Europe--History--Congresses.
Harvard subject headings:
Education--Europe--History--19th century.
Education--Europe--History--20th century.
Exiles--Education--History.
Princeton subject headings:
Education--Europe--History--19th century.
Education--Europe--History--20th century.
Exiles--Education--History.