Number of items: 1.
Monograph
    Büttner, T., Lutz, W. 
ORCID: https://orcid.org/0000-0001-7975-8145 & Speigner, W.
  
(1987).
    Some Demographic Aspects of Aging in the German Democratic Republic.
  
    IIASA Working Paper.
  IIASA, Laxenburg, Austria: WP-87-116
  
  
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