Columbia subject headings:
Corrections--United States--Statistics--Periodicals.
Prison sentences--United States--Statistics--Periodicals.
Prisoners--United States--Statistics--Periodicals.
Harvard subject headings:
Princeton subject headings:
Corrections--United States--Statistics--Periodicals.
Periodicals.
Prison sentences--United States--Statistics--Periodicals.
Prisoners--United States--Statistics--Periodicals.
Statistics.