Columbia subject headings:
Douglas, Howard, Sir, 1776-1861. Considerations on the value and importance of the North American provinces.
Tariff--Great Britain.
Harvard subject headings:
Douglas, Howard, Sir, 1776-1861. Considerations on the value and importance of the British North American provinces.
Forests and forestry--Taxation--Canada.
Great Britain--Colonies--Economic policy.
Princeton subject headings: