Columbia subject headings:
Authors, French--19th century--Correspondence.
Maupassant, Guy de, 1850-1893--Correspondence.
Zola, Émile, 1840-1902--Correspondence.
Harvard subject headings:
Authors, French--19th century--Correspondence
Maupassant, Guy de, 1850-1893--Correspondence.
Zola, Émile, 1840-1902. Correspondence.
Princeton subject headings:
Authors, French--19th century--Correspondence.
Maupassant, Guy de, 1850-1893--Correspondence.
Zola, Émile, 1840-1902. Correspondence.