Columbia subject headings:
Criminal justice, Administration of--Washington (D.C.)
Informational works.
Law enforcement--Washington (D.C.)
Police--Washington (D.C.)
Harvard subject headings:
Criminal justice, Administration of--Washington (D.C.)
Law enforcement--Washington (D.C.)
Police--Washington (D.C.)
Princeton subject headings:
Criminal justice, Administration of--Washington (D.C.)
Law enforcement--Washington (D.C.).
Police--Washington (D.C.)