Member of the Oneg Shabbat, responsible for cataloguing materials and copying documents – together with Hersz Wasser, Bluma Wasser and Eliasz Gutkowski
talented scholar, dedicated with his entire heart and soul to the development of Jewish culture, founder of YIKOR, the Jewish Cultural Organization. Ringelblum, whose Linder was one of the closest associates, was murdered at night, on 17/18 April 1942, during the April massacre.
Between March/April 1942 and July the same year, the Oneg Shabbat group published fifteen bulletins for the Jewish and Polish underground press.
Second edition of the Oneg Szabat Ambassadors Program.