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. 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.