Columbia subject headings:
Harvard subject headings:
Concentration camps--Europe--History--Congresses.
Hospitals--Europe--Social conditions--Congresses.
Inmates of institutions--Europe--Social conditions--Congresses.
Monasteries--Europe--Social conditions--Congresses.
Prisons--Europe--Social conditions--Congresses.
Princeton subject headings:
Hospitals--Europe--Social conditions--Congresses.
Inmates of institutions--Europe--Social conditions--Congresses.
Internment camps--Europe--Social conditions--Congresses.
Monasteries--Europe--Social conditions--Congresses.
Prisons--Europe--Social conditions--Congresses.