Columbia subject headings:
Harvard subject headings:
Engels, Friedrich, 1820-1895
Journalism--Political aspects--History--19th century.
Marx, Karl, 1818-1883
Neue rheinische Zeitung.
Press and politics--History--19th century.
Princeton subject headings:
Engels, Friedrich, 1820-1895.
Journalism--Political aspects--History--19th century.
Marx, Karl, 1818-1883.
Neue rheinische Zeitung.
Press and politics--History--19th century.