Columbia subject headings:
Keller, Gottfried, 1819-1890--Criticism and interpretation.
Keller, Gottfried, 1819-1890--Handbooks, manuals, etc.
Harvard subject headings:
Authors, Swiss--19th century--Biography
Keller, Gottfried, 1819-1890--Criticism and interpretation.
Keller, Gottfried, 1819-1890--Handbooks, manuals, etc.
Princeton subject headings:
Keller, Gottfried, 1819-1890--Criticism and interpretation.
Keller, Gottfried, 1819-1890--Handbooks, manuals, etc.