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. Delegate Positions on All Substantive Roll Calls at the United States Constitutional Convention, 1787 (ICPSR 33865) Dougherty, Keith L.; Heckelman, Jac C.