Columbia subject headings:
Dahlmann, F. C. (Friedrich Christoph), 1785-1860.
Historiography.
Treitschke, Heinrich von, 1834-1896.
World politics--History.
Harvard subject headings:
Dahlmann, F. C. (Friedrich Christoph), 1785-1860.
Treitschke, Heinrich von, 1834-1896.
Princeton subject headings: