. "Transit camp" . . "German camps in occupied Poland during World War II" . . . . . "camps in German-occupied Poland" . . "occupied Poland" . . "German concentration camps" . "the vast German camp system" . . . "transit to extermination camps" . "German death camps in occupied Poland" . "Nazi death camps" . "German labor and concentration camps" . . "dozens of concentration camps" . . . "German camps in occupied Poland during World War II" . "concentration and forced-labor camps" . . "Concentration camp" .