Columbia subject headings:
Excerpts.
Facsimiles.
Furrer, Beat, 1954---Manuscripts--Facsimiles.
Monologues with music (Orchestra)--Scores.
Music--Manuscripts--Facsimiles.
Operas--Excerpts--Scores.
Operas.
Scores.
Harvard subject headings:
Princeton subject headings:
Monologues with music (Instrumental ensemble)--Scores.
Operas--Excerpts--Scores.