Columbia subject headings:
German poetry--18th century--History and criticism.
German poetry--19th century--History and criticism.
Songs, German--18th century--History and criticism.
Songs, German--19th century--History and criticism.
Harvard subject headings:
Music--Philosophy and aesthetics
Simplicity (Philosophy)
Songs--Germany--Berlin--18th century--History and criticism.
Songs--Germany--Berlin--19th century--History and criticism.
Princeton subject headings:
German poetry--18th century--History and criticism.
German poetry--19th century--History and criticism.
Songs, German--18th century--History and criticism.
Songs, German--19th century--History and criticism.