Columbia subject headings:
Communism--Germany--History.
Germany--History--Revolution, 1848-1849.
Wagner, Richard, 1813-1883--Political and social views.
Harvard subject headings:
Communism--Germany--History
Germany--History--Revolution, 1848-1849.
Wagner, Richard, 1813-1883--Political and social views.
Princeton subject headings:
Communism.
Wagner, Richard, 1813-1883--Criticism and interpretation.
Wagner, Richard, 1813-1883--Philosophy.
Wagner, Richard, 1813-1883--Political and social views.
Wagner, Richard, 1813-1883. Literary works. Selections. English