Columbia subject headings:
Historical linguistics--France--History--19th century.
Historical linguistics--France--History--20th century.
Linguistics--France--History--19th century.
Linguistics--France--History--20th century.
Harvard subject headings:
Linguistics--France--History--19th century.
Linguistics--France--History--20th century.
Princeton subject headings:
Linguistics--France--History--19th century.