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Fertility and reproduction : methods of measuring the balance of births and deaths
Kuczynski, Robert René - 1982
Persistent link: https://www.econbiz.de/10013381274
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The balance of births and deaths
Kuczynski, Robert René - Brookings Institution - 1931
Persistent link: https://www.econbiz.de/10000376860
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Birth registration and birth statistics in Canada
Kuczynski, Robert René - 1930
Persistent link: https://www.econbiz.de/10002290411