"A letter written by an unknown person who secretly visited the ghetto and met W.Mahler; A letter written by W.Mahler; ; Carbon copies of illegal letters sent from the ghetto to Marie Machan to Železný Brod in February 1943, preserved among documents of Willy Mahler saved probably by his mother who survived in the ghetto."@mul . . "A 5698"@mul . . . . "A 5698"@mul . .