Columbia subject headings:
Authors, Swiss--20th century--Political and social views.
Gruppe Olten.
Swiss literature (German)--20th century--History and criticism.
Harvard subject headings:
Authors, Swiss--20th century--Political and social views.
Gruppe Olten.
Swiss literature (German)--20th century--History and criticism.
Princeton subject headings:
Authors, Swiss--20th century--Political activity.
Gruppe Olten.