Columbia subject headings:
Heine, Heinrich, 1797-1856--Criticism and interpretation.
Popular literature--Germany--History and criticism.
Harvard subject headings:
Heine, Heinrich, 1797-1856--Criticism and interpretation.
Popular literature--Germany--History and criticism
Princeton subject headings:
German literature--19th century--History and criticism.
Heine, Heinrich, 1797-1856--Criticism and interpretation.
Popular literature--Germany--History and criticism.