Columbia subject headings:
Legislation--United States.
Legislative histories--United States.
Harvard subject headings:
African Americans--Civil rights--History--Sources
Antitrust law--United States--History
Antitrust law--United States--Sources.
Banks and banking--Securities processing--Law and legislation--United States--Sources.
Civil rights--United States--History--Sources
Environmental policy--United States--History--20th century--Sources.
Food law and legislation--United States--Sources.
Homestead law--United States--Sources.
Interstate commerce--Law and legislation--United States--Sources.
Legislation--United States.
Legislative histories--United States.
Pacific railroads.
Railroad law--United States--Sources.
Restraint of trade--United States--History.
Social security--Law and legislation--United States--History.
Telecommunication--Law and legislation--United States--Sources.
Tennessee Valley Authority
Princeton subject headings:
Legislation--United States.
Legislative histories--United States.