Columbia subject headings:
Harvard subject headings:
Authors, French--20th century--Correspondence
Duhamel, Georges, 1884-1966--Correspondence.
Martin Du Gard, Roger, 1881-1958--Correspondence.
Princeton subject headings:
Duhamel, Georges, 1884-1966--Correspondence.
Martin Du Gard, Roger, 1881-1958. Correspondence.
Novelists, French--20th century--Correspondence.