RT Article T1 A longitudinal quasi-experimental study of violence and disorder impacts of urban CCTV camera clusters JF Criminal justice review VO 44 IS 2 SP 148 OP 164 A1 Ratcliffe, Jerry A2 Groff, Elizabeth LA English YR 2019 UL https://krimdok.uni-tuebingen.de/Record/191261247X DO 10.1177/0734016818811917