Columbia subject headings:
Art.
Europe--Economic conditions.
Finance--United States.
Railroads--United States.
United States--Economic conditions.
World War, 1914-1918.
Harvard subject headings:
Art
Europe--Economic conditions.
Finance--United States
Railroads--United States
United States--Economic conditions.
World War, 1914-1918
Princeton subject headings:
Art.
Europe--Economic conditions.
Finance--United States.
Railroads--United States.
United States--Economic conditions.
World War, 1914-1918.