United States. Children's Bureau
, Woodbury Sumner, Helen L., 1876-1933
and Merritt, Ella A. (Ella Arvilla).
Child Labor Legislation in the United States, Industrial Series No. 1, Bureau Publication No. 10 ,
Washington, D.C:
Government Printing Office,
1915, https://fraser.stlouisfed.org/title/8303,
accessed on December 2, 2025.