Columbia subject headings:
Industrial concentration--United States.
Industrial productivity--United States.
Manufactures--United States.
Manufacturing industries--United States.
Pricing--United States.
Harvard subject headings:
Industrial concentration--United States.
Industrial productivity--United States.
Manufactures--United States
Manufacturing industries--United States
Pricing--United States.
Princeton subject headings:
Industrial concentration--United States.
Industrial productivity--United States.
Manufacturing industries--United States.
Pricing--United States.