Study Search Results Your query returned 1 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. (?) Study Title/Investigator 1. Nations in Conflict: Data on National Growth and International Violence for Six European Major Powers, 1870-1914 (ICPSR 7425) Choucri, Nazli; North, Robert C.