Columbia subject headings:
Harvard subject headings:
Austria--History--Maria Theresa, 1740-1780--Congresses.
Lithuania--History, Military--18th century--Congresses.
Maria Theresa, Empress of Austria, 1717-1780--Congresses.
Poland--History, Military--18th century--Congresses.
Princeton subject headings:
Austria--History--1740-1789.
Austria--History--1789-1815.
Lithuania--History--18th century.
Poland--History--18th century.