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. National Assessment Survey of Law Enforcement Anti-Gang Information Resources, 1990-1991 (ICPSR 6237) Curry, G. David; Fox, Robert J.; Ball, Richard A.; et al.