Columbia subject headings:
Slatin, Rudolf Carl, Freiherr von, 1857-1932.
Sudan--History--1881-1899.
Harvard subject headings:
Slatin, Rudolf Carl, Freiherr von, 1857-1932
Sudan--History--1881-1899.
Princeton subject headings:
Slatin, Rudolf Carl, Freiherr von, 1857-1932.
Sudan--History--1881-1899.