TY - JOUR A1 - Manton, K. G. A1 - Stallard, E. A1 - Vaupel, J. W. T1 - Methods for Comparing the Mortality Experience of Heterogeneous Populations Y1 - 1981 DO - 10.2307/20610058 JF - Demography VL - 18 IS - 3 SP - 389 EP - -410 ER -