. . "Circulars issued by Rumkowski and the community offices in the Lodz Ghetto: Circular dated 08 November 1941: Announcement from Rumkowski regarding the blackout of factories during air-raid alerts"@eng . "Circulars issued by Rumkowski and the community offices in the Lodz Ghetto: Circular dated 08 November 1941: Announcement from Rumkowski regarding the blackout of factories during air-raid alerts"@eng . .