1939-1945 1942-1943 20thcentury administration auschwitz(concentrationcamp) bełżec(concentrationcamp) chelmno(concentrationcamp) concentrationcamps excavations(archaeology) history holocaust jewish(1939-1945) jews majdanek(concentrationcamp) operationreinhard operationreinhard(poland:1942-1943) persecutions personalnarratives pictorialworks poland polish sobibór(concentrationcamp) sobibór(concentrationcamp) socialconditions treblinka(concentrationcamp) worldwar