Columbia subject headings:
Aleatory music.
Instrumental ensembles--Parts.
Music--Manuscripts--Facsimiles.
Vocal ensembles with instrumental ensemble--Parts.
Vocalises with instrumental ensemble--Parts.
Wolff, Christian, 1934---Manuscripts--Facsimiles.
Harvard subject headings:
Princeton subject headings:
Aleatory music.
Instrumental ensembles--Scores.
Scores.
Vocal ensembles with instrumental ensemble--Scores.
Vocalises with instrumental ensemble--Scores.