Columbia subject headings:
International law--Congresses.
International law--History--Congresses.
International law--Study and teaching--Congresses.
Harvard subject headings:
International law--Congresses.
International law--History--Congresses.
International law--Study and teaching--Congresses.
Princeton subject headings:
International law--History--Congresses.
International law--Study and teaching--Congresses.
Law--Interpretation and construction--Congresses.