Columbia subject headings:
United States--Economic conditions--To 1865.
United States--History--1815-1861.
United States--Social conditions--To 1865.
Harvard subject headings:
United States--Economic conditions--To 1865.
United States--History--1815-1861.
United States--Social conditions--To 1865.
Princeton subject headings:
United States--Economic conditions--To 1865.
United States--History--1815-1861.
United States--Social conditions--To 1865.