Number of items: 1.
Monograph
    Praag, B.M.S. van, Dalen, H. van & Lutz, W. 
ORCID: https://orcid.org/0000-0001-7975-8145
  
(1994).
    Aging Populations and Social Challenges. Paper presented on IIASA's 20th Anniversary.
  
    IIASA Collaborative Paper.
  IIASA, Laxenburg, Austria: CP-94-007
  
  
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