Columbia subject headings:
Communists--France--Biography.
Socialists--France--Biography.
Sorel, Georges, 1847-1922.
Harvard subject headings:
Communists--France--Biography
Socialists--France--Biography
Sorel, Georges, 1847-1922
Princeton subject headings:
Communists--France--Biography.
Socialists--France--Biography.
Sorel, Georges, 1847-1922.