Detailed source information for all documents and images on the site can be found on the pages where they are located. The list below acknowledges the libraries and archives from which unpublished material was drawn.

Child Welfare League of America Papers, Social Welfare History Archives, University of Minnesota

Viola W. Bernard Papers, Archives and Special Collections, Augustus C. Long Library, Columbia University

Arnold Gesell Papers, Library of Congress, Manuscript Division

Hillcrest Children’s Center Papers, Library of Congress, Manuscript Division

Dorothy Hutchinson Papers, Butler Library, Columbia University, Rare Book and Manuscript Library

International Social Service, American Branch Papers, Social Welfare History Archives, University of Minnesota

National Urban League Papers, Library of Congress, Manuscript Division

Justine Wise Polier Papers, Schlesinger Library, Radcliffe Institute for Advanced Study, Harvard University

Jessie Taft Papers, Butler Library, Columbia University, Rare Book and Manuscript Library

U.S. Children’s Bureau Papers, National Archives II