Columbia subject headings:
United States--Politics and government--1993-2001--Periodicals.
United States--Politics and government--2001-2009--Periodicals.
Harvard subject headings:
Reference works
United States--Politics and government--1993-2001--Periodicals.
United States--Politics and government--2001-2009--Periodicals.
United States--Politics and government--2009-2017--Periodicals.
Princeton subject headings:
Periodicals.
United States--Politics and government--1993-2001--Periodicals.
United States--Politics and government--2001-2009--Periodicals.
United States--Politics and government--2009-2017--Periodicals.