Columbia subject headings:
Bachelard, Gaston, 1884-1962--Congresses.
Bergson, Henri, 1859-1941--Congresses.
Philosophy, French--20th century--Congresses.
Harvard subject headings:
Bachelard, Gaston, 1884-1962.
Bergson, Henri, 1859-1941
Philosophy, French--20th century.
Princeton subject headings:
Bachelard, Gaston, 1884-1962.
Bergson, Henri, 1859-1941.
Philosophy, French--20th century.