Columbia subject headings:
Nietzsche, Friedrich Wilhelm, 1844-1900.
Valéry, Paul, 1871-1945.
Harvard subject headings:
Nietzsche, Friedrich Wilhelm, 1844-1900
Valéry, Paul, 1871-1945
Princeton subject headings:
Nietzsche, Friedrich Wilhelm, 1844-1900.
Valéry, Paul, 1871-1945.