United States. Children's Bureau
and Woodbury, Robert Morse, 1889-. Maternal Mortality : The Risk of Death in Childbirth and From All Diseases Caused by Pregnancy and Confinement, Bureau Publication No. 158.
Washington, D.C:
Government Printing Office,
1926, https://fraser.stlouisfed.org/title/8438,
accessed on January 14, 2026.