Columbia subject headings:
Harvard subject headings:
Austria--History--1848-1867--Congresses.
Denmark--History--1849-1866--Congresses.
Prussia (Germany)--History--1815-1870--Congresses.
Schleswig-Holstein War, 1864--Peace--Congresses.
Schleswig-Holstein War, 1864--Treaties--Congresses.
Princeton subject headings:
Austria--History--1848-1867--Congresses.
Denmark--History--1849-1866--Congresses.
Prussia (Germany)--History--1815-1870--Congresses.
Schleswig-Holstein War, 1864--Peace--Congresses.
Schleswig-Holstein War, 1864--Treaties--Congresses.