Columbia subject headings:
Heine, Heinrich, 1797-1856--Friends and associates.
Heine, Heinrich, 1797-1856--Political and social views.
Harvard subject headings:
Heine, Heinrich, 1797-1856--Friends and associates.
Heine, Heinrich, 1797-1856--Political and social views.
Princeton subject headings:
Authors, Exiled--France--Paris--19th century--Biography.
Authors, German--19th century--Biography.
Communists--Germany--19th century--Biography.
Heine, Heinrich, 1797-1856--Friends and associates.
Intellectuals--Germany--19th century--Biography.