Columbia subject headings:
Harvard subject headings:
Mental health personnel and patient--History--19th century--Congresses.
Mental health personnel and patient--History--20th century--Congresses.
Mental health personnel--History--19th century--Congresses.
Mental health personnel--History--20th century--Congresses.
Psychiatric nursing--History--19th century--Congresses.
Psychiatric nursing--History--20th century--Congresses.
Princeton subject headings:
Mental health personnel and patient--History.
Mental health personnel--History.
Psychiatric nursing--History.