Columbia subject headings:
United States--Politics and government--1815-1861.
United States--Politics and government--1861-1865.
United States--Politics and government--1865-1900.
Harvard subject headings:
United States--History--Civil War, 1861-1865
United States--Politics and government--1815-1861.
United States--Politics and government--1865-1900.
Princeton subject headings:
United States--Politics and government--1815-1861.
United States--Politics and government--1861-1865.
United States--Politics and government--1865-1898.