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. National Fertility Survey, 1965 (ICPSR 20002) Westoff, Charles F.; Ryder, Norman B. 2. National Fertility Survey, 1970 (ICPSR 20003) Westoff, Charles F.; Ryder, Norman B.