Columbia subject headings:
Keller, Gottfried, 1819-1890--Congresses.
Walser, Robert, 1878-1956--Congresses.
Harvard subject headings:
Authors, Swiss--19th century--Congresses.
Authors, Swiss--20th century--Congresses.
German literature--19th century--History and criticism--Congresses
German literature--20th century--History and criticism--Congresses
Keller, Gottfried, 1819-1890--Congresses.
Politics in literature--Congresses.
Sociology in literature--Congresses.
Walser, Robert, 1878-1956--Congresses.
Princeton subject headings:
Keller, Gottfried, 1819-1890--Congresses.
Walser, Robert, 1878-1956--Congresses.