Columbia subject headings:
French fiction--19th century--History and criticism.
Money in literature.
Naturalism in literature.
Sex in literature.
Zola, Émile, 1840-1902--Criticism and interpretation.
Zola, Émile, 1840-1902. Rougon-Macquart.
Harvard subject headings:
Zola, Émile, 1840-1902--Criticism and interpretation.
Princeton subject headings:
Zola, Émile, 1840-1902--Criticism and interpretation.