Their report described the killing center at Chelmno: "For gassing a special vehicle (gas chamber) was used in which 90 people were loaded at a time... On average 1,000 people were gassed every day." ...
Zofia Szalek, a German residing in the Polish town of Chelmno, describes what she witnessed ... They housed eight gas chambers and forty-six ovens that could dispose of some 4,400 corpses ...
DAN SNOW: Hi, I'm Dan Snow. I'm a historian and I've been going through the BBC's archives looking for material that will help with your understanding of one of history's darkest events ever.