《新唐书·列传·卷一百四十六》
居于西北的，天授年间归附，有二十万户，列其地为朝州、吴州、浮州、归州等十州，人民散居于灵州、夏州之间。
在西北者，天授中内附，户凡二十万，以其地为朝、吴、浮、归十州，散居灵、夏间。
Living in the Northwest, joined during the Tianshou period, had 200,000 households, separated lands into ten counties: Chaozhou, Wuzhou, Fuzhou, Guizhou, etc. with its people living between Lingzhou and Xiazhou.