Columbia subject headings:
Electronic music.
Piano music (Pianos (2))--Scores.
Harvard subject headings:
Art music.
Chamber music.
Electronic music.
Facsimiles
Music--Manuscripts--Facsimiles.
Scores.
Stockhausen, Karlheinz, 1928-2007--Manuscripts--Facsimiles.
Trios (Pianos (2), electronics)--Scores.
Princeton subject headings:
Electronic music.
Piano music (Pianos (2))