Columbia subject headings:
Harvard subject headings:
Liechtenstein--Emigration and immigration--History.
Switzerland--Emigration and immigration--History.
Vorarlberg (Austria)--Emigration and immigration--History.
Princeton subject headings:
Liechtenstein--Emigration and immigration--History.
Switzerland--Emigration and immigration--History.
Vorarlberg (Austria)--Emigration and immigration--History.