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. Defining Law Enforcement's Role in Protecting American Agriculture From Agroterrorism in Kansas, Oklahoma, and Texas, 2003-2004 (ICPSR 32201) Knowles, Terry; Lane, James; Bayens, Gary; et al.