Columbia subject headings:
Harvard subject headings:
Escapes--Europe--History.
Europe--Emigration and immigration--History.
Political refugees--Europe--History.
Refugees--Europe--Social conditions.
Refugees--Government policy--Europe--History.
Social integration--Europe--History.
Princeton subject headings:
Escapes--Europe--History.
Europe--Emigration and immigration--History.
Political refugees--Europe--History.
Refugees--Europe--Social conditions.
Refugees--Government policy--Europe--History.
Social integration--Europe--History.