Columbia subject headings:
Parole--United States.
Prisoners--United States.
Prisons--United States.
Probation--United States.
Harvard subject headings:
Parole--United States
Prisons--Law and legislation--United States
Probation--United States
Princeton subject headings:
Parole--United States.
Prisons--Law and legislation--United States.
Probation--United States.