Columbia subject headings:
Harvard subject headings:
Authors, French--20th century--Correspondence
Paulin, Louisa, 1888-1944--Correspondence.
Perbosc, Antonin, 1861-1944--Correspondence.
Princeton subject headings:
Paulin, Louisa, 1888-1944--Correspondance.
Perbosc, Antonin, 1861-1944--Correspondance.