Columbia subject headings:
Crime prevention--Europe.
Justice, Administration of--Europe.
Prisoners--Europe--Statistics.
Prisons--Overcrowding--Europe--Statistics.
Harvard subject headings:
Prison administration--Europe.
Prisoners--Health and hygiene--Europe.
Prisons--Overcrowding--Europe.
Princeton subject headings:
Crime prevention--Europe.
Justice, Administration of--Europe.
Prisoners--Europe--Statistics.
Prisons--Overcrowding--Europe--Statistics.
Statistics.