Columbia subject headings:
Canada--Commercial policy.
Canada--Economic conditions.
Ontario--Economic conditions.
Tariff--Canada.
Transportation and state--Canada.
Harvard subject headings:
Canada--Commercial policy
Canada--Economic conditions--Regional disparities.
Ontario--Economic conditions.
Tariff--Canada
Transportation and state--Canada
Princeton subject headings:
Canada--Commercial policy.
Canada--Economic conditions--Regional disparities.
Ontario--Commercial policy.
Tariff--Canada.
Transportation and state--Canada.