According to historian William W. Hagen, "Generalplan Ost . . . forecast the diminution of the targeted east European peoples' populations by the following measures: Poles – 85 percent; Belarusians – 75 percent; Ukrainians – 65 percent; Czechs – 50 percent. ...
” 历史学家威廉·W·哈根（Hagen）称： 《东部总体计划》… 预想了东欧目标人口的灭绝尺度：波兰族 – 85%；白俄罗斯族 – 75%；乌克兰族 – 65%；捷克族 – 50%。