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. Comparative Cities Teaching Package (ICPSR 7698) Litchfield, R. Burr; Chudacoff, Howard P.