Columbia subject headings:
United States--History--Civil War, 1861-1865--Sources.
United States--History--Sources.
United States. Laws, statutes, etc.
Harvard subject headings:
United States--History--1865-1898--Sources.
United States--History--Civil War, 1861-1865--Sources.
United States--History--Sources.
Princeton subject headings:
United States--History--1865-1898--Sources.
United States--History--Civil War, 1861-1865--Sources.
United States--History--Sources.