Columbia subject headings:
Big business--United States.
Competition--United States.
Industrial concentration--United States.
Industrial efficiency--United States.
Industries--Size--United States.
Trade regulation--United States.
Harvard subject headings:
Big business--United States
Competition--United States
Industrial concentration--United States.
Industrial efficiency--United States.
Industries--Size--United States
Trade regulation--United States
Princeton subject headings:
Big business--United States.
Competition--United States.
Industrial concentration--United States.
Industrial efficiency--United States.
Industries--Size--United States.
Trade regulation--United States.