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Introduction to the mathematics of population
Keyfitz, Nathan - 1977 - Rev. print.
Persistent link: https://www.econbiz.de/10004582630
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Calculation of variances in a monthly population survey
Keyfitz, Nathan - In: Bulletin of the International Statistical Institute 35 (1957) 2, pp. 181-187
Persistent link: https://www.econbiz.de/10003600676
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Demography through problems
Keyfitz, Nathan; Beekman, John A. - 1984
Persistent link: https://www.econbiz.de/10004584007