Columbia subject headings:
Harvard subject headings:
American Federation of Labor--History.
Gompers, Samuel, 1850-1924.
Labor unions--United States--History
United States--Politics and government--1865-1933.
Working class--United States--History
Princeton subject headings:
American Federation of Labor--History.
Gompers, Samuel, 1850-1924.
Labor movement--United States--History.
Labor unions--United States--History.
United States--Politics and government--1865-1933.