Articles about the factories in the Lodz Ghetto, written by Josef Zelkowicz, 1942: "In the Plugs Factory", 31 May 1942 Establishment of the plugs factory, 01 September 1941; description of the stages in the establishment of the factory and the working conditions; description of its products; closing of the factory because raw materials were no longer available, March 1942; establishment of a factory for making slippers out of rags; employment of women in the factory.