TY - JOUR A1 - Ali, M.M. A1 - Cleland, J. A1 - Shah, I.H. T1 - Trends in reproductive behavior among young single women in Colombia and Peru: 1985-1999 Y1 - 2003 DO - 10.1353/dem.2003.0031 JF - Demography VL - 40 IS - 4 SP - 659 EP - -673 ER -