Columbia subject headings:
United States. Congress. Senate--Ethics.
United States. Congress. Senate. Select Committee on Ethics--Rules and practice.
Harvard subject headings:
Conflict of interests--United States.
United States. Congress. Senate--Ethics.
United States. Congress. Senate--Rules and practice.
United States. Congress. Senate. Select Committee on Ethics--Rules and practice.
Princeton subject headings:
United States. Congress. Senate--Ethics.
United States. Congress. Senate. Select Committee on Ethics--Rules and practice.