Columbia subject headings:
Authors, Swiss--19th century--Biography.
Keller, Gottfried, 1819-1890.
Harvard subject headings:
Authors, Swiss--19th century--Biography
Keller, Gottfried, 1819-1890--Biography.
Princeton subject headings:
Authors, Swiss--19th century--Biography.
Keller, Gottfried, 1819-1890--Biography.