Columbia subject headings:
Books and reading--France--History--20th century.
France--Intellectual life--20th century.
Press and politics--France--History--20th century.
Press--France--History--20th century.
Publishers and publishing--France--History--20th century.
Publishers and publishing--Political aspects--France--History--20th century.
Harvard subject headings:
Hachette (Firm)--History--20th century.
Publishers and publishing--France--History--20th century
Princeton subject headings:
Hachette (Firm)--History--20th century.
Publishers and publishing--France--History--20th century.