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Sixteenth Census of the United States, 1940
United States. Bureau of the Census
其他書名
Population, Differential Fertility, 1940 and 1910, Women by Number of Children Under 5 Years Old
出版U.S. Government Printing Office, 1945
URLhttp://books.google.com.hk/books?id=uE_GcwZ0yHwC&hl=&source=gbs_api
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