Columbia subject headings:
Buchanan, James, 1791-1868.
United States--History--Civil War, 1861-1865.
United States--Politics and government--1857-1861.
Harvard subject headings:
Buchanan, James, 1791-1868
United States--History--Civil War, 1861-1865
United States--Politics and government--1857-1861.
Princeton subject headings: