Columbia subject headings:
United States--Civilization--1783-1865.
United States--Social conditions--To 1865.
Working class--United States.
Harvard subject headings:
United States--Civilization--1783-1865.
United States--Civilization.
United States--Social conditions--To 1865.
United States--Social conditions.
Working class--United States
Princeton subject headings:
United States--Civilization--1783-1865.
United States--Social conditions--To 1865.
Working class--United States.