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. Washington, DC, Representatives: Private Interests in National Policymaking, 1982-1983 (ICPSR 6040) Heinz, John P.; Laumann, Edward O.; Nelson, Robert L.; et al.