1939-1945 asphyxiatingandpoisonous communicationoftechnicalinformation deutschearbeitsfront engineering forcedlabor gases general germany histoire history informationtechnique jews juifs nationalsocialism nationalsozialistischeskraftfahrkorps(germany) organisationtodt(germany) persecutions persécutions politicsandgovernment rédactiontechnique schutzstaffel sources technicalwriting technology worldwar