Columbia subject headings:
Buber, Martin, 1878-1965.
Creative thinking.
Freud, Sigmund, 1856-1939.
Originality.
Simmel, Georg, 1858-1918.
Harvard subject headings:
Buber, Martin, 1878-1965
Creative thinking.
Freud, Sigmund, 1856-1939
Originality.
Simmel, Georg, 1858-1918
Princeton subject headings:
Buber, Martin, 1878-1965.
Creative thinking.
Freud, Sigmund, 1856-1939.
Originality.
Simmel, Georg, 1858-1918.