Columbia subject headings:
Legal research--United States.
Legislation--Research--United States.
Legislative histories--United States.
Legislators--Research--United States.
Harvard subject headings:
Legal research--United States.
Legislation--Research--United States.
Legislation--United States.
Legislative histories--United States.
Legislators--Research--United States.
Princeton subject headings:
Legal research--United States.
Legislation--Research--United States.
Legislative histories--United States.
Legislators--Research--United States.