TY  - JOUR
A1  - Schoen, R. 
A1  - Tufis, P. 
T1  - Precursors of nonmarital fertility in the United States
Y1  - 2003
DO  - 10.1111/j.1741-3737.2003.01030.x
JF  - Journal of Marriage and Family 
VL  - 65
IS  - 4

ER  -