Study Search Results Your query returned 2 results. Results per page: 25 50 100 Sort by: Title A-Z Released/Updated Time Period Most Cited in ICPSR Bib. (?) Study Title/Investigator 1. Estimating Human Trafficking into the United States [Phase I: Development of a Methodology] (ICPSR 20422) Clawson, Heather J.; Lane, Mary; Small, Kevonne 2. Second International Self-Reported Delinquency Study, 2005-2007 (ICPSR 34658) Enzmann, Dirk; H. Marshall, Ineke; Killias, Martin; et al.