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Facing zero population growth : reactions and interpretations, past and present
Spengler, Joseph J. - 1978
Persistent link: https://www.econbiz.de/10000011039
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Changing demography and dependency costs : the implications of future dependency ratios and their composition
Clark, Robert L.; Spengler, Joseph J. - In: Aging and income : programs and prospects for the elderly, (pp. 55-89). 1978
Persistent link: https://www.econbiz.de/10002001987