Columbia subject headings:
Law--United States--History.
Liberty of contract--United States.
Liberty.
United States--Economic conditions.
United States--Politics and government--19th century.
United States--Social conditions.
Harvard subject headings:
Law--United States--History
Liberty of contract--United States.
Liberty.
United States--Economic conditions.
United States--Politics and government--19th century.
United States--Social conditions.
Princeton subject headings:
Law--United States--History.
Liberty of contract--United States.
Liberty.
United States--Economic conditions.
United States--Politics and government--19th century.
United States--Social conditions.