TY - JOUR A1 - Moultrie, T.A. A1 - Dorrington, R. T1 - Sources of error and bias in methods of fertility estimation contingent on the P/F Ratio in a time of declining fertility and rising mortality Y1 - 2008 DO - 10.4054/DemRes.2008.19.46 JF - Demographic Research VL - 19 IS - 46 SP - 1635 EP - -1662 ER -