Trends in birth rates in the United States since 1870.
| Autor principal: | |
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| Formato: | Livro |
| Idioma: | English |
| Publicado em: |
Baltimore
Johns Hopkins Press
1958.
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| Colecção: | The Johns Hopkins University studies in historical and political science
ser. 76, no. 1 |
| Assuntos: |