Columbia subject headings:
Police patrol--Germany--Surveillance operations.
Police patrol--United States--Surveillance operations.
Video recording--Law and legislation--Germany.
Video recording--Law and legislation--United States.
Video surveillance--Germany.
Video surveillance--Law and legislation.
Video surveillance--United States.
Harvard subject headings:
Electronic surveillance--Germany.
Electronic surveillance--United States
Privacy, Right of--Germany
Privacy, Right of--United States
Princeton subject headings: