Columbia subject headings:
Engels, Friedrich, 1820-1895.
Hegel, Georg Wilhelm Friedrich, 1770-1831.
Kant, Immanuel, 1724-1804--Criticism and interpretation.
Marx, Karl, 1818-1883.
Materialism.
Harvard subject headings:
Dialectical materialism--History.
Engels, Friedrich, 1820-1895
Hegel, Georg Wilhelm Friedrich, 1770-1831
Marx, Karl, 1818-1883
Princeton subject headings:
Engels, Friedrich, 1820-1895.
Hegel, Georg Wilhelm Friedrich, 1770-1831.
Kant, Immanuel, 1724-1804--Criticism and interpretation.
Marx, Karl, 1818-1883.
Materialism.