Columbia subject headings:
Canada--Commerce--Great Britain.
European Economic Community--Great Britain.
Great Britain--Commerce--Canada.
Produce trade--Canada.
Produce trade--Great Britain.
Harvard subject headings:
Canada--Commerce--Great Britain.
European Economic Community--Great Britain.
Great Britain--Commerce--Canada.
Produce trade--Canada.
Produce trade--Great Britain
Princeton subject headings:
Canada--Commerce--Great Britain.
European Economic Community--Great Britain.
Great Britain--Commerce--Canada.
Produce trade--Canada.