Columbia subject headings:
Slavery--United States--Controversial literature.
United States--Politics and government--1849-1853.
United States. Constitution.
Webster, Daniel, 1782-1852. Seventh of March speech.
Harvard subject headings:
Constitutional law--United States
Constitutions--United States
Slavery--United States--Controversial literature--1850.
United States--Politics and government--1849-1853.
Webster, Daniel, 1782-1852. Speech ... on Mr. Clay's resolutions ... March 7, 1850.
Princeton subject headings: