Search Results Use the search box below to revise your search, or start a new search. Studies (1) Variables Publications Your query returned 1 studies. Series results are grouped under the most relevant study. Ungroup series results to view all results. Sort by: Title A-Z Released/Updated Time Period Most Cited in ICPSR Bib. 1. Police Response to Street Gang Violence in California: Improving the Investigative Process, 1985 (ICPSR 8934) Klein, Malcolm W.; Maxson, Cheryl L.; Gordon, Margaret A.