TY - JOUR A1 - Raley, S.B. A1 - Mattingly, M.J. A1 - Bianchi, S.M. T1 - How dual are dual-income couples? Documenting change from 1970 to 2001 Y1 - 2006 DO - 10.1111/j.1741-3737.2006.00230.x JF - Journal of Marriage and the Family VL - 68 SP - 11 EP - -28 ER -