Columbia subject headings:
Nietzsche, Friedrich Wilhelm, 1844-1900.
Schopenhauer, Arthur, 1788-1860.
Harvard subject headings:
Nietzsche, Friedrich Wilhelm, 1844-1900
Schopenhauer, Arthur, 1788-1860
Princeton subject headings:
Nietzsche, Friedrich Wilhelm, 1844-1900.
Schopenhauer, Arthur, 1788-1860.