Columbia subject headings:
Kansas--Politics and government--1854-1861.
United States--History--Civil War, 1861-1865--Causes.
United States--Race relations.
United States. Kansas-Nebraska Act.
Harvard subject headings:
Kansas--Politics and government--1854-1861.
United States--History--Civil War, 1861-1865--Causes.
United States--Race relations
United States. Kansas-Nebraska Act.
Princeton subject headings: