Columbia subject headings:
Electronics in crime prevention--Congresses--Periodicals.
Electronics in criminal investigation--Congresses--Periodicals.
Police communication systems--Congresses--Periodicals.
Television in police work--Congresses--Periodicals.
Harvard subject headings:
Princeton subject headings:
Electronics in crime prevention--Congresses.
Electronics in criminal investigation--Congresses.
Police communication systems--Congresses.
Television in police work--Congresses.