Columbia subject headings:
Harvard subject headings:
Freud, Sigmund, 1856-1939
Hegel, Georg Wilhelm Friedrich, 1770-1831
Philosophy, Modern--19th century.
Philosophy, Modern--20th century.
Princeton subject headings:
Freud, Sigmund, 1856-1939.
Hegel, Georg Wilhelm Friedrich, 1770-1831.
Philosophy, Modern--19th century.
Philosophy, Modern--20th century.