Columbia subject headings:
Harvard subject headings:
Authors, French--20th century--Correspondence
Duhamel, Georges, 1884-1966--Correspondence.
Rolland, Romain, 1866-1944--Correspondence.
Princeton subject headings:
Authors, French--20th century--Correspondence.
Duhamel, Georges, 1884-1966--Correspondence.
Rolland, Romain, 1866-1944--Correspondence.