Columbia subject headings:
Harvard subject headings:
Education and state--Europe--History--20th century--Congresses.
Education--Europe--History--20th century--Congresses.
Learned institutions and societies--Europe--History--20th century--Congresses.
World War, 1914-1918--Education and the war--Congresses.
Princeton subject headings:
Education and state--Europe--History--20th century.
Education--Europe--History--20th century.
World War, 1914-1918.