Columbia subject headings:
Colonization.
Great Britain--Commercial policy.
Great Britain--Economic conditions.
United States--Commercial policy.
United States--Economic conditions.
Harvard subject headings:
Colonization.
Great Britain--Commercial policy.
Great Britain--Economic conditions.
United States--Commercial policy.
United States--Economic conditions.
Princeton subject headings:
Colonization.
Great Britain--Commercial policy.
Great Britain--Economic conditions.
United States--Commercial policy.
United States--Economic conditions.