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*1112 $aEconomic and Demographic Change : Issues for the 1980's$0(NO-TrBIB)90294329$_79116000
*2451 $aEconomic and Demographic Change: Issues for the 1980's$bproceedings of the conference, Helsinki, 1978$nVol. 2
*260  $aLiège$bInternational Union for the Scientific Study of Population$cc1979
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*650 0$aEconomic development$xCongresses$_25171200
*650 0$aPopulation$xCongresses$_72133000
*650 0$aPopulation$xEconomic aspects Congresses$_79116100
*7400 $aConference on Economic and Demographic Change: issues for the 1980's
*7400 $aHelsinki 1978
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