Columbia subject headings:
United States--Politics and government--1861-1865.
United States. Congress. House--History--19th century.
Harvard subject headings:
United States--History--Civil War, 1861-1865
United States--Politics and government--1861-1865.
United States. Congress. House--History--19th century.
Princeton subject headings:
United States--Politics and government--1861-1865.
United States. Congress. House--History--19th century.