Columbia subject headings:
Napoleon III, Emperor of the French, 1808-1873.
Harvard subject headings:
France--History--Second Empire, 1852-1873--Sources--Bibliography--Catalogs.
Napoleon III, Emperor of the French, 1808-1873--Correspondence--Catalogs.
Napoleon III, Emperor of the French, 1808-1873--Relations with Germans.
Princeton subject headings:
Napoleon III, Emperor of the French, 1808-1873.