TY - COMP A1 - Harris, K.M. T1 - The National Longitudinal Study of Adolescent to Adult Health (Add Health), Waves I & II, 1994–1996; Wave III, 2001–2002; Wave IV, 2007−2009 Y1 - 2009 CY - Chapel Hill, NC: Carolina Population Center, University of North Carolina at Chapel Hill N1 - machine-readable data file and documentation ER -