Columbia subject headings:
Idealism, German--History.
Philosophy, German--History--18th century.
Philosophy, German--History--19th century.
Philosophy, Modern.
Realism--History.
Harvard subject headings:
Idealism, German--History.
Philosophy, German--18th century.
Philosophy, German--19th century.
Philosophy, German--History--18th century.
Philosophy, German--History--19th century.
Philosophy, Modern.
Realism--History.
Princeton subject headings: