Study Search Results Your query returned 1 results. Series results are grouped under the most relevant study. You can ungroup series results. Use the search box below to revise your search, or start a new search. Results per page: 25 50 100 Sort by: Title A-Z Released/Updated Time Period Most Cited in ICPSR Bib. Most Downloaded (?) Study Title/Investigator 1. Calls for Service to Police as a Means of Evaluating Crime Trends in Oklahoma City, 1986-1988 (ICPSR 9669) Bursik, Robert J. Jr.; Grasmick, Harold G.; Chamlin, Mitchell B.