Columbia subject headings:
Slavery--United States--Controversial literature.
Slavery--United States--Extension to the territories.
United States--Politics and government--1849-1853.
United States. Constitution.
Harvard subject headings:
Constitutional law--United States
Constitutions--United States
Slavery--United States--Controversial literature.
Slavery--United States--Extension to the territories
United States--Politics and government--1849-1853.
Princeton subject headings: