Columbia subject headings:
Arbitration, Industrial--United States--Periodicals.
Railroads--United States--Employees--Periodicals.
Harvard subject headings:
Arbitration, Industrial--United States--Periodicals
Railroads--United States--Employees--Periodicals
Princeton subject headings:
Arbitration, Industrial--United States--Periodicals.
Periodicals.
Railroads--United States--Employees--Periodicals.