Columbia subject headings:
Nietzsche, Friedrich Wilhelm, 1844-1900.
Whitman, Walt, 1819-1892--Philosophy.
Harvard subject headings:
Nietzsche, Friedrich Wilhelm, 1844-1900
Whitman, Walt, 1819-1892
Princeton subject headings:
Nietzsche, Friedrich Wilhelm, 1844-1900.
Whitman, Walt, 1819-1892.