1. Blos, Peter. “An Intimate History of the School in the Wattmanngasse” (unpublished, 1974). Peter Blos Papers, Library of Congress, Washington, DC.
2. Burlingham, Bob. “Our School.” In Unsere Weihnachtszeitung, authored by Hietzing School Pupils (1928). Peter Blos Papers, Library of Congress, Washington, DC.
3. Chodorow, Nancy. Transcript of interview of Marie Briehl, 9 February 1982. Schlesinger Library, Radcliffe Institute, Harvard University.
4. Freud, W. Ernest. Typescript of “Psychoanalytic Pedagogy, Reminiscences of the Rosenfeld-Burlingham School.” Peter Heller Papers, Library of Congress, Washington, DC.
5. Hietzing School Pupils. Unsere Weihnachtszeitung (1928, 1929). Peter Blos Papers, Library of Congress, Washington, DC.