Columbia subject headings:
Collegium Musicum Zürich.
Concert programs.
Concerts--Switzerland--Zurich.
Music--20th century--History and criticism.
Sacher, Paul.
Harvard subject headings:
Collegium Musicum Zürich.
Concert programs.
Concerts--Switzerland--Zurich.
Music--20th century--History and criticism
Sacher, Paul.
Princeton subject headings:
Collegium Musicum Zürich.
Music--Switzerland--Zürich.
Sacher, Paul.