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: Study Relevance Title A-Z Released/Updated Time Period Most Cited in ICPSR Bib. Variable Relevance 1. United States Congressional Roll Call Voting Records, 1789-1998 (ICPSR 4) Inter-university Consortium for Political and Social Research; Congressional Quarterly, Inc.