Study Search Results Your query returned 4 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. Adaptation Process of Cuban and Mexican Immigrants in the United States, 1972-1979 (ICPSR 9672) Portes, Alejandro 2. Americans View Their Mental Health, 1957 and 1976: Selected Variables (ICPSR 7949) Veroff, Joseph; Douvan, Elizabeth; Kulka, Richard 3. Americans View Their Mental Health, 1976 (ICPSR 7948) Veroff, Joseph; Douvan, Elizabeth; Kulka, Richard 4. Explorations in Equality of Opportunity, 1955-1970 [United States] (ICPSR 7671) Eckland, Bruce K.