Study Search Results Your query returned 4 results. Series results are grouped under the most relevant study. You can ungroup series results. Results per page: 25 50 100 Sort by: Study Relevance Title A-Z Released/Updated Time Period Most Cited in ICPSR Bib. Variable Relevance (?) Study Title/Investigator 1. Monitoring the Future: A Continuing Study of American Youth (12th-Grade Survey), 2000 (ICPSR 3184) Johnston, Lloyd D.; Bachman, Jerald G.; O'Malley, Patrick M. 56 more results in Monitoring the Future (MTF) Series 2. Oregon Youth Substance Use Project (OYSUP), 1998-2010 (ICPSR 34263) Andrews, Judy 3. Older Drug Users: A Life Course Study of Turning Points in Drug Use [in a large Southeastern Metropolitan Area], 2009-2010 (ICPSR 34296) Boeri, Miriam ; Whalen, Thor 4. Maternal Lifestyle Study in Four Sites in the United States, 1993-2011 (ICPSR 34312) Lester, Barry; Bada, Henrietta; Bauer, Charles; et al.