"The field work for this study was carried on jointly by the Women's bureau and the Industrial division of the Children's bureau."--Letter of Transmittal. "The section on legal regulations was prepared by Ella A. Merritt."--Letter of transmittal. At head of title: United States Department of labor. Frances Perkins, secretary. Children's bureau. Katharine F. Lenroot, chief.
Series:
United States. Children's bureau. Bureau publication no. 234
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