00614nam a2200145Ia 4500008004100000010001200041040001700053082002500070110005200095245009300147260004800240300001400288440006700302650009900369190328s9999||||xx |||||||||||||| ||und||  a60-5753  aNITILcNITIL  221sta312.063bN277D  aNational Bureau of Economic Research (New York) 0aDemographic and economic change in developed countriesba conference of the universities  aPrincetonbPrinceton University Pressc1960  axi, 536p.  aNational Bureau of Economic Research special conference series  aDemographic surveys; Demography-Developing Countries; Developing countries-Economic conditions