Columbia subject headings:
Europe, Eastern--Emigration and immigration--History--Congresses.
Germans--Europe, Eastern--Congresses.
Oberschwaben (Germany)--Emigration and immigration--History--Congresses.
Ulm (Germany)--History--Congresses.
Harvard subject headings:
Hungary--Emigration and immigration--History--18th century--Congresses.
Oberschwaben (Germany)--Emigration and immigration--History--18th century--Congresses.
Ulm (Germany)--Emigration and immigration--History--18th century--Congresses.
Princeton subject headings: