TY - JOUR A1 - Preston, S.H. A1 - Stokes, A. T1 - Sources of population aging in more and less developed countries Y1 - 2012 DO - 10.1111/J.1728-4457.2012.00490.X UR - http://dx.doi.org/10.1111/J.1728-4457.2012.00490.X VL - 38 IS - 2 ER -