Columbia subject headings:
Metaphysics.
Nietzsche, Friedrich Wilhelm, 1844-1900.
Harvard subject headings:
Nietzsche, Friedrich Wilhelm, 1844-1900
Nietzsche, Friedrich Wilhelm, 1844-1900--Criticism and interpretation.
Philosophy, German--20th century.
Princeton subject headings:
Nietzsche, Friedrich Wilhelm, 1844-1900--Contributions in metaphysics.