Study Search Results Your query returned 3 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. Evaluation of the Weed and Seed Initiative in the United States, 1994 (ICPSR 6789) Roehl, Jan 2. Retail-Level Heroin Enforcement and Property Crime in 30 Cities in Massachusetts, 1980-1986 (ICPSR 9667) Kleiman, Mark A.R.; Putala, Christopher E. 3. Testing Theories of Criminality and Victimization in Seattle, 1960-1990 (ICPSR 9741) Miethe, Terance D.