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. 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. Basic Geographic and Historic Data for Interfacing ICPSR Data Sets, 1620-1983 [United States] (ICPSR 8159) Sechrist, Robert P. 2. Great Plains Population and Environment Data: Biogeochemical Modeling Data, 1860-2003 [United States] (ICPSR 31681) Parton, William J.; Gutmann, Myron P.; Hartman, Melannie D.; et al.