United States. Children's Bureau and Johnson, Elizabeth S., 1902-. Welfare of Families of Sugar-Beet Laborers : A Study of Child Labor and Its Relation to Family Work, Income, and Living Conditions in 1935, Bureau Publication No. 247 , Washington, D.C: Government Printing Office, 1939, https://fraser.stlouisfed.org/title/8521, accessed on December 11, 2024.