Columbia subject headings:
Hartmann, Ludo Moritz, 1865-1924.
Historians--Austria--Biography.
Historiography--Austria.
Harvard subject headings:
Hartmann, Ludo Moritz, 1865-1924.
Historians--Austria--Biography.
Historiography--Austria.
Princeton subject headings:
Hartmann, Ludo Moritz, 1865-1924.
Historians--Austria--Biography.
Historiography--Austria.