Columbia subject headings:
International law--East Asia--History--19th century--Congresses.
International law--East Asia--History--20th century--Congresses.
International law--Europe--History--19th century--Congresses.
International law--Europe--History--20th century--Congresses.
Harvard subject headings:
International law--Congresses.
International law--East Asia--Congresses.
International law--Europe--Congresses.
Princeton subject headings:
International law--East Asia--History--19th century--Congresses.
International law--East Asia--History--20th century--Congresses.
International law--Europe--History--19th century--Congresses.
International law--Europe--History--20th century--Congresses.