United States. Children's Bureau , Wright, Helen R. (Helen Russell), 1891-1969 and Breckinridge, Sophonisba Preston, 1866-1948. Children of Wage-Earning Mothers : A Study of a Selected Group in Chicago, Bureau Publication No. 102 , Washington, D.C: Government Printing Office, 1922, https://fraser.stlouisfed.org/title/8384, accessed on November 11, 2024.