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. Union Army Recruits in White Regiments in the United States, 1861-1865 (ICPSR 9425) Fogel, Robert W.; Engerman, Stanley L.; Pope, Clayne; et al. 2. Union Army Rejected Recruits in the United States, 1861-1865 (ICPSR 9428) Fogel, Robert W.; Steckel, Richard H.