Columbia subject headings:
Big business--United States--Statistics.
Big business--United States.
Industrial concentration--United States--Statistics.
Manufactures--United States--Statistics.
Manufactures--United States.
Manufacturing industries--United States--Statistics.
Harvard subject headings:
Big business--United States
Legislative materials.
Manufactures--United States
Manufacturing industries--United States
Princeton subject headings:
Big business--United States.
Manufactures--United States.
Manufacturing industries--United States.