Columbia subject headings:
Bergson, Henri, 1859-1941--Congresses.
Freud, Sigmund, 1856-1939--Congresses.
Harvard subject headings:
Bergson, Henri, 1859-1941--Congresses.
Freud, Sigmund, 1856-1939--Congresses.
Princeton subject headings:
Bergson, Henri, 1859-1941--Congresses.
Freud, Sigmund, 1856-1939--Congresses.