Trends in birth rates in the United States since 1870.
| 1. autor: | |
|---|---|
| Format: | Książka |
| Język: | English |
| Wydane: |
Baltimore
Johns Hopkins Press
1958.
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| Seria: | The Johns Hopkins University studies in historical and political science
ser. 76, no. 1 |
| Hasła przedmiotowe: |