Columbia subject headings:
Authors, French--20th century--Correspondence.
Gide, André, 1869-1951--Correspondence.
Royère, Jean, 1871-1956--Correspondence.
Harvard subject headings:
Authors, French--20th century--Correspondence
Gide, André, 1869-1951. Correspondence
Royère, Jean, 1871---Correspondence.
Princeton subject headings:
Authors, French--20th century--Correspondence.
Gide, André, 1869-1951. Correspondence.
Royère, Jean, 1871-1956--Correspondence.