Columbia subject headings:
Filibusters (Political science)--United States.
United States. Congress. Senate--Rules and practice.
Harvard subject headings:
Filibusters (Political science)--United States.
United States. Congress. Senate--Cloture.
United States. Congress. Senate--Freedom of debate.
Princeton subject headings:
Filibusters (Political science)--United States.
United States. Congress. Senate--Rules and practice.