Search Results Use the search box below to revise your search, or start a new search. Studies (2) Variables Publications Your query returned 2 studies. Sort by: Title A-Z Released/Updated Time Period Most Cited in ICPSR Bib. 1. Family and Population Control Study: Puerto Rico, 1953-1954 (ICPSR 7062) Back, Kurt W.; Hill, Reuben; Stycos, J. Mayone 2. University Students' Values, Vocations, and Political Orientations: Puerto Rico, 1964 (ICPSR 7063) Lipset, S.M.