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 21, 1921, for the Period March 20, 1922, to June 30, 1923, Bureau Publication No. 137 ,
Washington, D.C:
Government Printing Office,
1924, https://fraser.stlouisfed.org/title/8417,
accessed on December 24, 2025.