Columbia subject headings:
Harvard subject headings:
Authors, German--19th century--Biography--Congresses.
Heine, Heinrich, 1797-1856--Anniversaries, etc.
Heine, Heinrich, 1797-1856--Criticism and interpretation--Congresses.
Princeton subject headings:
Heine, Heinrich, 1797-1856--Anniversaries, etc.
Heine, Heinrich, 1797-1856--Congresses.