United States. Children's Bureau
, Duncan, Beatrice Sheets
and Duke, Emma, 1876-.
Infant Mortality : Results of a Field Study in Manchester, N.H. Based on Births in One Year, Infant Mortality Series No. 6, Bureau Publication No. 20 ,
Washington, D.C:
Government Printing Office,
1917, https://fraser.stlouisfed.org/title/8313,
accessed on December 26, 2025.