Columbia subject headings:
Kierkegaard, Søren, 1813-1855.
Nietzsche, Friedrich Wilhelm, 1844-1900.
Philosophers.
Philosophy, Modern.
Schopenhauer, Arthur, 1788-1860.
Harvard subject headings:
Kierkegaard, Søren, 1813-1855
Nietzsche, Friedrich Wilhelm, 1844-1900
Philosophers
Philosophy, Modern.
Schopenhauer, Arthur, 1788-1860
Princeton subject headings: