Columbia subject headings:
Dialectic.
Existentialism.
Kierkegaard, Søren, 1813-1855.
Marx, Karl, 1818-1883.
Harvard subject headings:
Dialectic.
Existentialism.
Kierkegaard, Søren, 1813-1855
Marx, Karl, 1818-1883
Princeton subject headings:
Dialectic.
Existentialism.
Kierkegaard, Søren, 1813-1855.
Marx, Karl, 1818-1883.