Columbia subject headings:
Birdsongs.
Music theory.
Musical analysis.
Musical meter and rhythm.
Tone color (Music)
Harvard subject headings:
Birdsongs
Composition (Music)
Messiaen, Olivier, 1908-1992--Criticism and interpretation.
Music theory.
Musical analysis.
Musical meter and rhythm.
Princeton subject headings:
Music theory.
Musical analysis.
Musical meter and rhythm.