Columbia subject headings:
Literature.
Harvard subject headings:
Duras, Marguerite--Criticism and interpretation.
Lyric poetry--History and criticism
Music and language--Philosophy.
Nietzsche, Friedrich Wilhelm, 1844-1900--Contributions in philosophy of music.
Plato--Music.
Rousseau, Jean-Jacques, 1712-1778--Criticism and interpretation.
Princeton subject headings:
Literature--History and criticism.