Columbia subject headings:
Harvard subject headings:
Austria--History--Revolution, 1848-1849.
Engels, Friedrich, 1820-1895
Neue Rheinische Zeitung.
Slavs--Austria--History.
Slavs--Europe, Eastern--History.
Slavs--History--Philosophy.
Princeton subject headings:
Austria--History--Revolution, 1848-1849.
Engels, Friedrich, 1820-1895.
Neue rheinische Zeitung.
Slavs--Austria--History.
Slavs--Eastern Europe--History.
Slavs--History--Philosophy.