Columbia subject headings:
Harvard subject headings:
Occitan language--Political aspects--History--18th century.
Occitan language--Political aspects--History--19th century.
Occitan language--Social aspects--History--18th century.
Occitan language--Social aspects--History--19th century.
Occitan language--Writing--History--18th century.
Occitan language--Writing--History--19th century.
Princeton subject headings:
Occitan language--Political aspects--History--18th century.
Occitan language--Political aspects--History--19th century.
Occitan language--Social aspects--History--18th century.
Occitan language--Social aspects--History--19th century.
Occitan language--Writing--History--18th century.
Occitan language--Writing--History--19th century.