Columbia subject headings:
Harvard subject headings:
Québec (Province)--Foreign economic relations--United States.
Québec (Province)--Relations--United States.
United States--Foreign economic relations--Québec (Province)
United States--Relations--Québec (Province)
Princeton subject headings:
Québec (Province)--Foreign economic relations--United States.
Québec (Province)--Relations--United States.
United States--Foreign economic relations--Québec (Province).
United States--Relations--Québec (Province).