Appointment diaries 1934-1946; files containing correspondence with and other documents concerning family members and friends, including Claude Brown, Alex Goldstern, Ludwig Greve, William Kilpatrick, Grete Wasservogel and others 1920-1985 (-1995); identity papers and other personal documents 1900-1973; manuscripts of `Out of the Fire', `The Children of Montmorency', `The Austrian School Reform' and many other publications (1924-) 1941-1971, n.d.; copies of published articles and documents concerning his publications 1941-1971 (-1980); files on the International Pedagogical Information 1936-1939; on the children's homes of the OSE and the evacution of these children to the USA 1939-1941, with letters and memoirs by former refugee children 1945-1995; on his work for the USC and his role as Child Projects Director in postwar Europe 1946; on his work as director of the AYWY 1945-1950; on his school directorship in New York 1949-1962; on his visits to Israel, Japan and Sweden 1966, 1968; on the Nazi persecution of Austrian Jews and Socialists and the Austrian resistance 1936-1945 (-1981) and files containing correspondence of comrades, including letters by Friedrich Adler, Hugo Breitner, Wilhelm Ellenbogen and Otto Leichter 1940-1945; manuscripts of the (unpublished) autobiography of Helene Papanek and transcripts of interviews with her 1978-1979; copies of periodicals and clippings concerning Papanek 1946-1981. Accrual 2019: Stein Collection and Elly Kaiser Stein Collection.