Columbia subject headings:
Harvard subject headings:
Canada--Foreign economic relations--United States--Congresses.
Energy policy--Canada--Congresses.
Investments, American--Canada--Congresses.
Investments, Foreign--Law and legislation--Canada--Congresses.
United States--Foreign economic relations--Canada--Congresses.
Princeton subject headings:
Canada--Foreign economic relations--United States.
United States--Foreign economic relations--Canada.