Child labor legislation in the United States - Sumner, Helen L. (Helen Laura), 1876-1933.; Merritt, Ella Arvilla, 1882-; United States. Children's Bureau (Washington : [For sale by] the Supt. of Docs., G.P.O., 1915)
At head of title: U.S. Dept. of Labor, Children's Bureau.
Mode of access: Internet.
Keywords: Child labor -- United States -- States