Columbia subject headings:
Harvard subject headings:
Germans--Hungary--Social conditions--18th century--Congresses.
Germans--Hungary--Social conditions--19th century--Congresses.
Hungary--Social life and customs--18th century--Congresses.
Hungary--Social life and customs--19th century--Congresses.
Social norms--Hungary--History--18th century--Congresses.
Social norms--Hungary--History--19th century--Congresses.
Princeton subject headings:
Hungary--Social conditions--18th century.
Hungary--Social conditions--19th century.