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Population and America's future
Spengler, Joseph J. - 1975
Persistent link: https://www.econbiz.de/10000116060
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Population change, modernization, and welfare
Spengler, Joseph J. - 1974
Persistent link: https://www.econbiz.de/10013476884
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Population theory and policy : selected readings
Spengler, Joseph J. (contributor);  … - 1956
Persistent link: https://www.econbiz.de/10003202773