Columbia subject headings:
Labor leaders--United States--Biography.
Labor unions--Officials and employees--United States--Biography.
Labor unions--United States--Directories.
Labor unions--United States--Officials and employees--Biography.
Harvard subject headings:
Labor unions--United States--Directories
Labor unions--United States--Officials and employees--Biography
Working class--United States--Biography
Princeton subject headings:
Directories.
Labor movement--United States--Biography.
Labor unions--United States--Directories.
Labor unions--United States--Officials and employees--Biography.