The promotion of the welfare and hygiene of maternity and infancy : the administration of the act of Congress of November 23, 1921, fiscal year ended June 30, 1928
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書誌事項
The promotion of the welfare and hygiene of maternity and infancy : the administration of the act of Congress of November 23, 1921, fiscal year ended June 30, 1928
（Bureau publication / U.S. Department of Labor, Children's Bureau, no. 194）
Government Printing Office, 1929
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注記
At head of title: U.S. Department of Labor, Children's Bureau