Columbia subject headings:
Manuscripts--Switzerland--Basel--Exhibitions.
Music--20th century--History and criticism.
Music--20th century--Manuscripts--Exhibitions.
Paul Sacher Stiftung (Basel, Switzerland)--Exhibitions.
Harvard subject headings:
Composers--Autographs
Composers.
Music--Manuscripts--Facsimiles
Princeton subject headings:
Manuscripts--Switzerland--Basel--Exhibitions.
Music--20th century--History and criticism.
Music--20th century--Manuscripts--Exhibitions.
Paul Sacher Stiftung (Basel, Switzerland)--Exhibitions.