. . "Documentation: Commemoration assemblies held in France and Belgium to mark 20 years since the Warsaw Ghetto Uprising, 01 April 1963, including letters relating to Dr. Dworzecki serving as a representative of the Jewish Agency and Bar Ilan University at th"@eng . "Documentation: Commemoration assemblies held in France and Belgium to mark 20 years since the Warsaw Ghetto Uprising, 01 April 1963, including letters relating to Dr. Dworzecki serving as a representative of the Jewish Agency and Bar Ilan University at th"@eng . .