Columbia subject headings:
Music--History and criticism.
Music--Mathematics.
Harvard subject headings:
Princeton subject headings:
Goddesses, Greek--Philosophy.
Gods, Germanic--Philosophy.
Gods, Greek--Philosophy.
Idolatry--Songs and music--History and criticism.
Kittler, Friedrich A. Musik und Mathematik.
Music--Mathematics.
Mythology, Germanic--Songs and music--History and criticism.
Mythology--Songs and music--History and criticism.
Popular music and art music--Philosophy.
Wagner, Richard, 1813-1883. Ring des Nibelungen--Criticism, Textual.