Columbia subject headings:
Austria--History--1848-1867--Congresses.
Austria--Politics and government--19th century--Congresses.
Harvard subject headings:
Austria--History--1848-1867--Congresses.
Austria--Politics and government--19th century--Congresses.
Constitutional history--Austria--19th century--Congresses.
Constitutional history--Austria--History--19th century--Congresses.
Princeton subject headings:
Austria--History--1848-1867--Congresses.
Austria--Politics and government--19th century--Congresses.
Constitutional history--Austria--19th century--Congresses.
Constitutional history--Austria--History--19th century--Congresses.