TY - JOUR A1 - Kohler, H.-P. A1 - Ortega, J.A. T1 - Tempo-adjusted period parity progression measures: Assessing the implications of delayed childbearing for cohort fertility in Sweden, the Netherlands and Spain Y1 - 2002 DO - 10.4054/DemRes.2002.6.7 VL - 6 IS - 7 ER -