TY - JOUR A1 - Preston, S.H. A1 - Himes, C. A1 - Eggers, M. T1 - Demographic conditions responsible for population aging Y1 - 1989 DO - 10.2307/2061266 UR - http://dx.doi.org/10.2307/2061266 VL - 26 IS - 4 ER -