Columbia subject headings:
France--Social conditions--19th century.
Proletariat in literature.
Working class writings, French--History and criticism.
Working class--France--History--19th century.
Harvard subject headings:
France--Social conditions--19th century.
Proletariat in literature.
Working class writings, French--History and criticism.
Working class--France--History--19th century
Princeton subject headings:
France--Social conditions--19th century.
Proletariat in literature.
Working class writings, French--History and criticism.
Working class--France--History--19th century.