Columbia subject headings:
Bibliography--France--Methodology.
Book industries and trade--France--History--20th century.
Books--France--History--20th century.
Harvard subject headings:
Bibliography--France--Methodology.
Book industries and trade--France--History--20th century.
Books--France--History--20th century.
Princeton subject headings:
Bibliography--France--Methodology.
Book industries and trade--France--History--20th century.
Books--France--History--20th century.