Columbia subject headings:
Europe--Foreign economic relations--United States--Congresses.
Europe--Foreign relations--United States--Congresses.
Research--Atlantic Ocean Region--International cooperation--Congresses.
United States--Foreign economic relations--Europe--Congresses.
United States--Foreign relations--Europe--Congresses.
Harvard subject headings:
Europe--Foreign economic relations--United States--Congresses.
Europe--Foreign relations--United States--Congresses.
Research--Atlantic Ocean Region--International cooperation--Congresses.
United States--Foreign economic relations--Europe--Congresses.
United States--Foreign relations--Europe--Congresses.
Princeton subject headings: