Columbia subject headings:
Press--Employees--Labor unions--France--History--19th century.
Press--Employees--Labor unions--France--History--20th century.
Printing industry--Employees--Labor unions--France--History--19th century.
Printing industry--Employees--Labor unions--France--History--20th century.
Harvard subject headings:
Printing--France--History--20th century.
Syndicalism--France--History--20th century.
Princeton subject headings: