Study Search Results Your query returned 3 results. Series results are grouped under the most relevant study. You can ungroup series results. Results per page: 25 50 100 Sort by: Title A-Z Released/Updated Time Period Most Cited in ICPSR Bib. Most Downloaded (?) Study Title/Investigator 1. Children of Immigrants Longitudinal Study (CILS), 1991-2006 (ICPSR 20520) Portes, Alejandro; Rumbaut, Rubén G. 2. Immigrants Admitted to the United States, 1972 (ICPSR 8952) United States Department of Justice. Immigration and Naturalization Service 27 more results in Immigrants Admitted to the United States Series 3. Immigration and Intergenerational Mobility in Metropolitan Los Angeles (IIMMLA), 2004 (ICPSR 22627) Rumbaut, Rubén G.; Bean, Frank D.; Chávez, Leo R.; et al.