Columbia subject headings:
Harvard subject headings:
Authors, French--20th century--Correspondence
Pergaud, Louis, 1882-1915--Correspondence.
Rocher, Edmond, 1873---Correspondence.
Princeton subject headings:
Authors, French--20th century--Correspondence.
Pergaud, Louis, 1882-1915--Correspondence.
Rocher, Edmond--Correspondence.