Columbia subject headings:
Correctional law--Europe.
Correctional law--Japan.
Correctional law--United States.
Prisons--Europe.
Prisons--Japan.
Prisons--United States.
Harvard subject headings:
Prisons--Europe
Prisons--Japan
Prisons--Law and legislation--Europe.
Prisons--Law and legislation--Japan
Prisons--Law and legislation--United States
Prisons--United States
Princeton subject headings:
Prisons--Europe.
Prisons--Japan.
Prisons--Law and legislation--Europe.
Prisons--Law and legislation--Japan.
Prisons--Law and legislation--United States.
Prisons--United States.