United States. Children's Bureau.
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, 1929, Bureau Publication No. 203 ,
Washington, D.C:
Government Printing Office,
1931, https://fraser.stlouisfed.org/title/8479,
accessed on July 16, 2026.