Columbia subject headings:
Hartmann, Eduard von, 1842-1906.
Philosophy, German--19th century.
Harvard subject headings:
Hartmann, Eduard von, 1842-1906.
Philosophy, German--19th century.
Princeton subject headings:
Hartmann, Eduard von, 1842-1906--Contemporaries.
Hartmann, Eduard von, 1842-1906.
Nietzsche, Friedrich Wilhelm, 1844-1900--Contemporaries.