Columbia subject headings:
Slavery--United States--Controversial literature.
United States--History--Civil War, 1861-1865.
United States--Politics and government--1861-1865.
Harvard subject headings:
Slavery--United States--Controversial literature--1859-1863.
United States--History--Civil War, 1861-1865
United States--History--Civil War, 1861-1865.
Princeton subject headings:
Slavery--United States--Controversial literature--1859-1863.
United States--History--Civil War, 1861-1865.
United States--Politics and government--1861-1865.