Columbia subject headings:
Harvard subject headings:
Mental illness--Europe--History--20th century--Congresses.
Psychiatry--Europe--History--20th century--Congresses.
World War, 1914-1918--Psychological aspects--Congresses.
Princeton subject headings:
Mental illness--Europe--History--20th century--Congresses.
Psychiatry--Europe--History--20th century--Congresses.
World War, 1914-1918--Psychological aspects--Congresses.