Columbia subject headings:
Harvard subject headings:
Habermas, Jürgen
Hegel, Georg Wilhelm Friedrich, 1770-1831
Marx, Karl, 1818-1883
Work--History.
Princeton subject headings:
Habermas, Jürgen.
Hegel, Georg Wilhelm Friedrich, 1770-1831.
Marx, Karl, 1818-1883.
Work--History.