Columbia subject headings:
Authors, German--19th century--Biography.
Busch, Wilhelm, 1832-1908--Ethics.
Harvard subject headings:
Authors, German--19th century--Biography
Busch, Wilhelm, 1832-1908--Character.
Busch, Wilhelm, 1832-1908--Psychology.
Princeton subject headings:
Authors, German--19th century--Biography.
Busch, Wilhelm, 1832-1908--Biography--Character.