Columbia subject headings:
Law--Europe, Eastern--History--19th century--Congresses.
Law--Europe, Eastern--History--20th century--Congresses.
Harvard subject headings:
Law--Europe, Eastern--History--19th century--Congresses.
Law--Europe, Eastern--History--20th century--Congresses.
Princeton subject headings:
Law--Europe, Eastern--History--19th century--Congresses.
Law--Europe, Eastern--History--20th century--Congresses.