Columbia subject headings:
Industrial relations--United States--History.
Industrial welfare--United States--History.
Iron and steel workers--United States--History.
Steel industry and trade--United States--Personnel management--History.
Harvard subject headings:
Industrial relations--United States--History
Industrial welfare--United States--History.
Iron and steel workers--United States--History.
Steel industry and trade--United States--Personnel management--History.
Princeton subject headings:
Industrial relations--United States--History.
Industrial welfare--United States--History.
Iron and steel workers--United States--History.
Steel industry and trade--United States--Personnel management--History.