Columbia subject headings:
Law enforcement--United States--Statistics--Periodicals.
Police--United States--Statistics--Periodicals.
Sheriffs--United States--Statistics--Periodicals.
Harvard subject headings:
Princeton subject headings:
Law enforcement--United States--Statistics--Periodicals.
Periodicals.
Police--United States--Statistics--Periodicals.
Sheriffs--United States--Statistics--Periodicals.
Statistics.