Columbia subject headings:
Hegel, Georg Wilhelm Friedrich, 1770-1831.
Kant, Immanuel, 1724-1804.
Marx, Karl, 1818-1883.
Sociology--History.
Sociology--Philosophy.
Sociology.
Weber, Max, 1864-1920.
Harvard subject headings:
Hegel, Georg Wilhelm Friedrich, 1770-1831
Hegel, Georg Wilhelm Friedrich, 1770-1831--Contributions in sociology.
Kant, Immanuel, 1724-1804
Kant, Immanuel, 1724-1804--Contributions in sociology.
Marx, Karl, 1818-1883
Sociology--History
Sociology--Philosophy
Weber, Max, 1864-1920.
Princeton subject headings:
Sociology--Philosophy.