1. National Education Longitudinal Study, 1988 Publication/Creation: Ann Arbor, Mich. : Inter-university Consortium for Political and Social Research, [1990?] Resource Type: Computer File Access & Availability: Loading
2. National longitudinal surveys of labor market experience, 1966-1991 Publication/Creation: [Ann Arbor, Mich.] : [Inter-university Consortium for Political and Social Research], [1990]- Resource Type: Computer File Access & Availability: Loading
3. Nationwide personal transportation survey Publication/Creation: [Washington, D.C.?] : U.S. Dept. of Transportation, <1990-> Resource Type: Computer File Access & Availability: Loading