Columbia subject headings:
Italy--In literature.
Swiss literature (German)
Harvard subject headings:
Italy--In literature--Congresses.
Italy--Relations--Switzerland--Congresses.
Swiss literature (German)--History and criticism--Congresses.
Swiss literature (German)--Themes, motives--Congresses.
Switzerland--Relations--Italy--Congresses.
Princeton subject headings:
Italy--In literature.
Swiss literature (German)--History and criticism.
Swiss literature (German)--Themes, motives.