Columbia subject headings:
Aleatory music.
Percussion ensembles--Scores.
Piano music (Pianos (2))--Scores.
Harvard subject headings:
Percussion ensembles--Scores.
Piano music (Pianos (2))--Scores
Princeton subject headings:
Aleatory music.
Percussion ensembles--Scores.
Piano music (Pianos (2))--Scores.
Scores.