Columbia subject headings:
Harvard subject headings:
Political science--Germany--History--Congresses.
Political science--United States--History--Congresses.
Social sciences--Germany--History--Congresses.
Social sciences--United States--History--Congresses.
Sociology--Germany--History--Congresses.
Sociology--United States--History--Congresses.
Princeton subject headings:
Political science--Germany--History--Congresses.
Political science--United States--History--Congresses.
Social sciences--Germany--History--Congresses.
Social sciences--United States--History--Congresses.
Sociology--Germany--History--Congresses.
Sociology--United States--History--Congresses.