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- [3] The Balance of Births and Deaths, vol 1, Western and Northern Europe AMERICAN ECONOMIC REVIEW, 1930, 20 (02): : 346 - 349
- [4] The Balance of Births and Deaths, vol. 1, Western and Northern Europe. EUGENICS REVIEW, 1929, 21 (02): : 130 - 131
- [5] The Balance of Births and Deaths, vol 1 ANNALS OF THE AMERICAN ACADEMY OF POLITICAL AND SOCIAL SCIENCE, 1929, 142 : 461 - 462
- [10] THE BALANCE OF BIRTHS AND DEATHS, vol 2, Eastern and Southern Europe SOCIOLOGY AND SOCIAL RESEARCH, 1933, 17 (05): : 485 - 485