"David Kohl and family papers"@en . . "irn500574" . "United States Holocaust Memorial Museum"@en . . . . . "Photocopied material in Polish, one from a published work, and one from manuscript (unidentified), with note indicating that published one dealt with contents of newsletter created by orphans in orphanage of Janusz Korczak."@en . . "folder\n\n1"@en .