Columbia subject headings:
Ecuador--Foreign economic relations--United States.
Investments, American--Law and legislation--Ecuador.
Investments, Foreign--Law and legislation--United States.
United States--Foreign economic relations--Ecuador.
Harvard subject headings:
Ecuador--Foreign economic relations--United States.
Investments, American--Law and legislation--Ecuador.
Investments, Foreign--Law and legislation--United States.
United States--Foreign economic relations--Ecuador.
Princeton subject headings: