Columbia subject headings:
Learning and scholarship--Europe--History--20th century--Congresses.
Social sciences--Europe--History--20th century--Congresses.
Harvard subject headings:
Learning and scholarship--Europe--History--20th century--Congresses.
Learning and scholarship--Europe--History--Congresses.
Social sciences--Europe--History--20th century--Congresses.
Social sciences--Europe--History--Congresses.
Princeton subject headings:
Learning and scholarship--Europe--History--20th century--Congresses.
Social sciences--Europe--History--20th century--Congresses.