00332nam a22000977a 4500020001500000050001700015100001800032245008900050260008600139300000900225  a2871080348  aRA564.8 1994  aWlter Mertens  aHealth and Mortality Trends among Elderly PopulationsbDeterminants and Implications  aBelgiumbInternational Union for the Scientific study of population (IUSSP)c1994  a30 p